Octovigintiseptingentillion

An octovigintiseptingentillion is equal to \(10^{2187}\) in the short scale and \(10^{4368}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 728th -illion number.
In the long scale, \(10^{2187}\) is called quattuorsexagintatrecentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{2187}\) (exact) 	\(1\times10^{2187}\) (exact)
Arrow notation 	\(10\uparrow 2187\) (exact) 	\(10\uparrow 2187\) (exact)
Steinhaus-Moser Notation 	759[3] 	760[3]
Chained arrow notation 	\(10\rightarrow 2187\) (exact) 	\(10\rightarrow 2187\) (exact)
Taro's multivariable Ackermann function	A(3,7262) 	A(3,7263)
BEAF & Bird's array notation 	{10,2187} (exact) 	{10,2187} (exact)
Hyper-E notation 	E2187 (exact) 	E2187 (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)(759) 	m(1)(760)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(7252)\) 	\(f_2(7253)\)
Hardy hierarchy 	\(H_{\omega^2}(7252)\) 	\(H_{\omega^2}(7253)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 2+\omega^2+\omega 8+7}}(10)\) (exact)	\(g_{\omega^{\omega^3 2+\omega^2+\omega 8+7}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{4368}\) (exact) 	\(1\times10^{4368}\) (exact)
Arrow notation 	\(10\uparrow 4368\) (exact) 	\(10\uparrow 4368\) (exact)
Steinhaus-Moser Notation 	1389[3] 	1390[3]
Chained arrow notation 	\(10\rightarrow 4368\) (exact) 	\(10\rightarrow 4368\) (exact)
Taro's multivariable Ackermann function	A(3,14507) 	A(3,14508)
BEAF & Bird's array notation 	{10,4368} (exact) 	{10,4368} (exact)
Hyper-E notation 	E4368 (exact) 	E4368 (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)(1389) 	m(1)(1390)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(14496)\) 	\(f_2(14497)\)
Hardy hierarchy 	\(H_{\omega^2}(14496)\) 	\(H_{\omega^2}(14497)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 4+\omega^2 3+\omega 6+8}}(10)\) (exact)	\(g_{\omega^{\omega^3 4+\omega^2 3+\omega 6+8}}(10)\) (exact)
== Sources ==
== See also ==
Category:Numbers
Category:Class 2
Category:Illion
Category:Numbers with 1000 to 1000000 digits
Category:Tier 1 -illion numbers