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quindecicentillion is equal to \(10^{348}\) in the short scale and \(10^{690}\) in the long scale by the Conway and Guy's naming system[1][2][3][4] as it is the 115th -illion number.

In the long scale, \(10^{348}\) is called octoquinquagintillion.

Approximations[]

For the short scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{348}\)
Arrow notation \(10\uparrow 348\)
Taro's multivariable Ackermann function A(3,1153) A(3,1154)
BEAF {10,348}
Hyper-E notation E348
Fast-growing hierarchy \(f_2(1145)\) \(f_2(1146)\)
Hardy hierarchy \(H_{\omega^2}(1145)\) \(H_{\omega^2}(1146)\)

For the long scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{690}\)
Arrow notation \(10\uparrow 690\)
Taro's multivariable Ackermann function A(3,2289) A(3,2290)
BEAF {10,690}
Hyper-E notation E690
Fast-growing hierarchy \(f_2(2280)\) \(f_2(2281)\)
Hardy hierarchy \(H_{\omega^2}(2280)\) \(H_{\omega^2}(2281)\)

Sources[]

  1. Conway and Guy. (1995) "The book of Numbers" Copernicus
  2. Munafo, Robert. The Conway-Wechsler System. Retrieved 2023-02-09.
  3. Olsen, Steve. Big-Ass Numbers. Retrieved 2023-02-09.
  4. Fish. Conway's zillion numbers. Retrieved 2023-02-09.

See also[]

Main article: -illion
100–109: centillion (un- · duo- · tres- · quattuor- · quin- · sex- · septen- · octo- · noven-)
110–119: decicentillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
120–129: viginticentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septem- · octo- · novem-)
130–139: trigintacentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
140–149: quadragintacentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
150–159: quinquagintacentillion (un- · duo- · tres- · quattuor- · quin- · ses- · septen- · octo- · noven-)
160–169: sexagintacentillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
170–179: septuagintacentillion (un- · duo- · tre- · quattuor- · quin- · se- · septen- · octo- · noven-)
180–189: octogintacentillion (un- · duo- · tres- · quattuor- · quin- · sex- · septem- · octo- · novem-)
190–199: nonagintacentillion (un- · duo- · tre- · quattuor- · quin- · se- · septe- · octo- · nove-)
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