Octovigintisescentillion

An octovigintisescentillion is equal to \(10^{1887}\) in the short scale and \(10^{3768}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 628th -illion number.
In the long scale, \(10^{1887}\) is called quattuordecitrecentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{1887}\) (exact) 	\(1\times10^{1887}\) (exact)
Arrow notation 	\(10\uparrow 1887\) (exact) 	\(10\uparrow 1887\) (exact)
Steinhaus-Moser Notation 	668[3] 	669[3]
Chained arrow notation 	\(10\rightarrow 1887\) (exact) 	\(10\rightarrow 1887\) (exact)
Taro's multivariable Ackermann function	A(3,6265) 	A(3,6266)
BEAF & Bird's array notation 	{10,1887} (exact) 	{10,1887} (exact)
Hyper-E notation 	E1887 (exact) 	E1887 (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)(668) 	m(1)(669)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(6255)\) 	\(f_2(6256)\)
Hardy hierarchy 	\(H_{\omega^2}(6255)\) 	\(H_{\omega^2}(6256)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3+\omega^2 8+\omega 8+7}}(10)\) (exact)	\(g_{\omega^{\omega^3+\omega^2 8+\omega 8+7}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{3768}\) (exact) 	\(1\times10^{3768}\) (exact)
Arrow notation 	\(10\uparrow 3768\) (exact) 	\(10\uparrow 3768\) (exact)
Steinhaus-Moser Notation 	1220[3] 	1221[3]
Chained arrow notation 	\(10\rightarrow 3768\) (exact) 	\(10\rightarrow 3768\) (exact)
Taro's multivariable Ackermann function	A(3,12514) 	A(3,12515)
BEAF & Bird's array notation 	{10,3768} (exact) 	{10,3768} (exact)
Hyper-E notation 	E3768 (exact) 	E3768 (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)(1220) 	m(1)(1221)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(12503)\) 	\(f_2(12504)\)
Hardy hierarchy 	\(H_{\omega^2}(12503)\) 	\(H_{\omega^2}(12504)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 3+\omega^2 7+\omega 6+8}}(10)\) (exact)	\(g_{\omega^{\omega^3 3+\omega^2 7+\omega 6+8}}(10)\) (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