Quattuorsexagintasescentillion

A quattuorsexagintasescentillion is equal to \(10^{1995}\) in the short scale and \(10^{3984}\) in the long scale by the and 's naming systemConway and Guy. (1995) "The book of Numbers" Copernicus as it is the 664th -illion number.
In the long scale, \(10^{1995}\) is called duotrigintatrecentilliard.
==Approximations==
For the short scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{1995}\) (exact) 	\(1\times10^{1995}\) (exact)
Arrow notation 	\(10\uparrow 1995\) (exact) 	\(10\uparrow 1995\) (exact)
Steinhaus-Moser Notation 	701[3] 	702[3]
Chained arrow notation 	\(10\rightarrow 1995\) (exact) 	\(10\rightarrow 1995\) (exact)
Taro's multivariable Ackermann function	A(3,6624) 	A(3,6625)
BEAF & Bird's array notation 	{10,1995} (exact) 	{10,1995} (exact)
Hyper-E notation 	E1995 (exact) 	E1995 (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)(701) 	m(1)(702)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(6614)\) 	\(f_2(6615)\)
Hardy hierarchy 	\(H_{\omega^2}(6614)\) 	\(H_{\omega^2}(6615)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3+\omega^2 9+\omega 9+5}}(10)\) (exact)	\(g_{\omega^{\omega^3+\omega^2 9+\omega 9+5}}(10)\) (exact)
For the long scale:
Notation 	Lower bound 	Upper bound
Scientific notation 	\(1\times10^{3984}\) (exact) 	\(1\times10^{3984}\) (exact)
Arrow notation 	\(10\uparrow 3984\) (exact) 	\(10\uparrow 3984\) (exact)
Steinhaus-Moser Notation 	1281[3] 	1282[3]
Chained arrow notation 	\(10\rightarrow 3984\) (exact) 	\(10\rightarrow 3984\) (exact)
Taro's multivariable Ackermann function	A(3,13231) 	A(3,13232)
BEAF & Bird's array notation 	{10,3984} (exact) 	{10,3984} (exact)
Hyper-E notation 	E3984 (exact) 	E3984 (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)(1281) 	m(1)(1282)
Bashicu matrix system 	(0)(1)[3] 	(0)(1)[4]
Fast-growing hierarchy 	\(f_2(13220)\) 	\(f_2(13221)\)
Hardy hierarchy 	\(H_{\omega^2}(13220)\) 	\(H_{\omega^2}(13221)\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^3 3+\omega^2 9+\omega 8+4}}(10)\) (exact)	\(g_{\omega^{\omega^3 3+\omega^2 9+\omega 8+4}}(10)\) (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