Octononagintaseptingentillion

An octononagintaseptingentillion is equal to \(10^{2397}\) in the short scale and \(10^{4788}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 798th -illion number.
In the long scale, \(10^{2397}\) is called novenonagintatrecentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2397}\) (exact) 	\(1\times10^{2397}\) (exact)
Arrow notation 	\(10\uparrow 2397\) (exact) 	\(10\uparrow 2397\) (exact)
Steinhaus-Moser Notation 	822[3] 	823[3]
Chained arrow notation 	\(10\rightarrow 2397\) (exact) 	\(10\rightarrow 2397\) (exact)
Taro's multivariable Ackermann function	A(3,7959) 	A(3,7960)
BEAF & Bird's array notation 	{10,2397} (exact) 	{10,2397} (exact)
Hyper-E notation 	E2397 (exact) 	E2397 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(9)\) 	\(s(1)^3(\lambda x.x+1)(10)\)
m(n) map 	m(1)(822) 	m(1)(823)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(7949)\) 	\(f_2(7950)\)
Hardy hierarchy 	\(H_{\omega^2}(7949)\) 	\(H_{\omega^2}(7950)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2 3+\omega 9+7}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2 3+\omega 9+7}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{4788}\) (exact) 	\(1\times10^{4788}\) (exact)
Arrow notation 	\(10\uparrow 4788\) (exact) 	\(10\uparrow 4788\) (exact)
Steinhaus-Moser Notation 	1506[3] 	1507[3]
Chained arrow notation 	\(10\rightarrow 4788\) (exact) 	\(10\rightarrow 4788\) (exact)
Taro's multivariable Ackermann function	A(3,15902) 	A(3,15903)
BEAF & Bird's array notation 	{10,4788} (exact) 	{10,4788} (exact)
Hyper-E notation 	E4788 (exact) 	E4788 (exact)
s(n) map 	\(s(1)^3(\lambda x.x+1)(10)\) 	\(s(1)^3(\lambda x.x+1)(11)\)
m(n) map 	m(1)(1506) 	m(1)(1507)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(15891)\) 	\(f_2(15892)\)
Hardy hierarchy 	\(H_{\omega^2}(15891)\) 	\(H_{\omega^2}(15892)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 4+\omega^2 7+\omega 8+8}}(10)\) (exact)	\(g_{\omega^{\omega^3 4+\omega^2 7+\omega 8+8}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Powers of 10 with squarefree exponent
Category:Tier 1 -illion numbers