/*
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	@TT_beginner
	*/
	#include <bits/stdc++.h>
	using namespace std;
	#define ok1 cerr<<"ok1\n";
	#define ok2 cerr<<"ok2\n";
	#define M LLONG_MAX
	#define rep(i,n) for(int i=0;i<n;++i)
	#define REP(i,s,n) for(int i=(s);i<(n);++i)
	#define repr(i,n) for(int i=n-1;i>=0;--i)
	#define REPR(i,s,n) for(int i=(s);i>=(n);--(i))
	#define all(a) (a).begin(),(a).end()
	#define reall(a) (a).rbegin(),(a).rend()
	#define pb emplace_back //emplace_backの方が早いが慣れているため
	#define DOUBLE fixed << setprecision(15)
	#define fi first
	#define se second
	#define mp make_pair
	#define mt make_tuple
	const double pi = acos(-1.0L);
	typedef vector<int> vi;
	typedef vector<string> vs;
	typedef long long ll;
	typedef vector<ll> vll;
	typedef vector<vi> vvi;
	typedef vector<vll> vvll;
	typedef vector<char> vc;
	typedef vector<double> vd;
	typedef vector<bool> vb;
	typedef deque<ll> dll;
	typedef pair<ll, ll> P;
	typedef tuple<ll, ll, ll> TLL;
	typedef vector<P> vP;
	typedef vector<TLL> vTLL;
	const ll mod = 1e9 + 7;
	//const ll mod = 998244353;
	ll dy[4] = { 1,0,-1,0 };
	ll dx[4] = { 0,1,0,-1 };
	template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
	template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
	template<class A, class B>
	ostream& operator<<(ostream& ost, const pair<A, B>&p) {
		ost << "{ " << p.first << ", " << p.second << " }";
		return ost;
	}
	template<class T>
	ostream& operator<<(ostream& ost, const vector<T>&v) {
		ost << "{ ";
		for (int i = 0; i<v.size(); i++) {
			if (i)ost << ", ";
			ost << v[i];
		}
		ost << " }";
		return ost;
	}
	template<class A, class B>
	ostream& operator<<(ostream& ost, const map<A, B>&v) {
		ost << "{ ";
		for (auto p : v) {
			ost << "{ " << p.first << ", " << p.second << " }";
		}
		ost << " }";
		return ost;
	}
	bool out_check(ll a, ll b) { return (0 <= a && a < b); }
	double pitagoras(ll a, ll b, ll c, ll d) {
		double dx = a - b, dy = c - d;
		return pow(dx * dx + dy * dy, 0.5);
	}
	ll modpow(ll a, ll b) { ll c = 1; while (b > 0) { if (b & 1) { c = a * c%mod; }a = a * a%mod; b >>= 1; }return c; }
	void Yes(bool x) { cout << ((x) ? "Yes\n" : "No\n"); }
	void YES(bool x) { cout << ((x) ? "YES\n" : "NO\n"); }
	void yes(bool x) { cout << ((x) ? "yes\n" : "no\n"); }
	void Yay(bool x) { cout << ((x) ? "Yay!\n" : ":(\n"); }
	vector<long long> w;
	void divisor(long long n)//n�̖񐔂��
	{
		for (long long i = 1; i*i <= n; ++i)
		{
			if (n%i == 0)
			{
				w.pb(i);
				//cout << i << endl;
				if (i != 1 && i*i != n)
				{
					w.pb(n / i);
					//cout << n/i << endl;
				}
			}
		}
		//sort(w.begin(), w.end());
		w.pb(n);
		//cerr << w<<endl;
	}

	bool cal(ll n, ll a){
		if(n<a){
			if(n==1) return true;
			else return false;
		}
		if(n%a==0) {
			while(n%a==0) n/=a;
			return cal(n,a);
		}
		else {
			return n%a==1;
		}
	}

	int main() {
		cin.tie(0); ios::sync_with_stdio(false);//not intractive
		// ll n,k,c;
		// string s;
		// cin>>n>>k>>c>>s;
		ll n;
		cin>>n;
		divisor(n);
		divisor(n-1);
		ll ans=0;
		for(auto a:w){
			if(a==1)continue;
			if(cal(n,a))ans++;
		}
		cout<<ans<<endl;
	}

Measured memory_bytes: 384