Byllion is equal to \(10^{16}\) in the myriad system[1][2][3], or 10 squared 4 times. It is equal to 10 quadrillion in the short scale and 10 billiard in the long scale.

Its full decimal expansion is 10,000,000,000,000,000.

It is also called Jing (京 in Chinese) or Kei (けい in Japanese) in both Japanese counting system and Chinese counting system.[4]

Aarex Tiaokhiao calls this number sxdoocol or 16-noogol.[5]

A Byllion dollars in 25 piles of 100 dollar bills, in comparison to the Empire State Building

As a banknote denomination

Only the Hungarian pengő had banknotes with this number in the denomination.


Notation Lower bound Upper bound
Scientific notation \(1\times10^{16}\)
Arrow notation \(10\uparrow16\)
Steinhaus-Moser Notation 13[3] 14[3]
Copy notation 9[16] 1[17]
Taro's multivariable Ackermann function A(3,50) A(3,51)
Pound-Star Notation #*(2,4,4)*5 #*(5)*21
BEAF {10,16}
Hyper-E notation E16
Bashicu matrix system (0)(0)[10000]
Hyperfactorial array notation 18! 19!
Fast-growing hierarchy \(f_2(47)\) \(f_2(48)\)
Hardy hierarchy \(H_{\omega^2}(47)\) \(H_{\omega^2}(48)\)
Slow-growing hierarchy \(g_{\omega^{\omega+6}}(10), g_{\omega^{2}}^{4}(10)\)


See also

myllion byllion tryllion quadryllion quintyllion
sextyllion septyllion octyllion nonyllion decyllion
undecyllion duodecyllion tredecyllion quattuordecyllion quindecyllion
sexdecyllion septdecyllion octodecyllion novemdecyllion vigintyllion
unvigintyllion duovigintyllion trevigintyllion quattuorvigintyllion quinvigintyllion
sexvigintyllion septemvigintyllion octovigintyllion novemvigintyllion trigintyllion
untrigintyllion duotrigintyllion tretrigintyllion quattuortrigintyllion quintrigintyllion
sextrigintyllion septtrigintyllion octotrigintyllion novemtrigintyllion quadragintyllion
quinquagintyllion sexagintyllion septuagintyllion octogintyllion nonagintyllion
centyllion ducentyllion trecentyllion quadringentyllion quingentyllion
sescentyllion septingentyllion octingentyllion nongentyllion millyllion
myryllion micryllion nanyllion picyllion femtyllion
attyllion zeptyllion yoctyllion googolyllion latinlatinlatinbyllionyllionyllionyllion

Fish numbers: Fish number 1 · Fish number 2 · Fish number 3 · Fish number 4 · Fish number 5 · Fish number 6 · Fish number 7
Mapping functions: S map · SS map · S(n) map · M(n) map · M(m,n) map
By Aeton: Okojo numbers · N-growing hierarchy
By BashicuHyudora: Primitive sequence number · Pair sequence number · Bashicu matrix system
By Kanrokoti: KumaKuma ψ function
By 巨大数大好きbot: Flan numbers
By Jason: Irrational arrow notation · δOCF · δφ · ε function
By mrna: 段階配列表記 · 降下段階配列表記 · 多変数段階配列表記 · SSAN · S-σ
By Nayuta Ito: N primitive
By p進大好きbot: Large Number Garden Number
By Yukito: Hyper primitive sequence system · Y sequence · YY sequence · Y function
Indian counting system: Lakh · Crore · Tallakshana · Uppala · Dvajagravati · Paduma · Mahakathana · Asankhyeya · Dvajagranisamani · Vahanaprajnapti · Inga · Kuruta · Sarvanikshepa · Agrasara · Uttaraparamanurajahpravesa · Avatamsaka Sutra · Nirabhilapya nirabhilapya parivarta
Chinese, Japanese and Korean counting system: Wan · Yi · Zhao · Jing · Gai · Zi · Rang · Gou · Jian · Zheng · Zai · Ji · Gougasha · Asougi · Nayuta · Fukashigi · Muryoutaisuu
Other: Taro's multivariable Ackermann function · TR function · Arai's \(\psi\) · Sushi Kokuu Hen

Community content is available under CC-BY-SA unless otherwise noted.