Platillion, 1,999-illion or millianongennovemnonagintillion is equal to \(10^{6,000}\), \(1,000^{2,000}\), or 6000-plex.[1] It is equal to 1 millillion in the long scale. It is 6,001 digits long. The name "platillion" is on Jonathan Bowers' -illion list, but he claims that it is not his invention — its origin is otherwise unknown. Sbiis Saibian coined milli-novemnonagintinongentillion using generalizations of Jonathan Bowers -illion system.[2]
This number is also called duokilillion (not to be confused with Bowers' duokillillion) in Russ Rowlett's Greek-based naming system of zillions.[3]
Aarex Tiaokhiao gave it the name bimlastillion, referring to the value of this number.[4]
YouTuber Metsuka The Cute Princess 2007 coined heskironchime for this number.[5]
The full decimal expansion of this number is:
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Approximations[]
| Notation | Lower bound | Upper bound |
|---|---|---|
| Scientific notation | \(1\times10^{6\,000}\) | |
| Arrow notation | \(10\uparrow6\,000\) | |
| Steinhaus-Moser Notation | 1838[3] | 1839[3] |
| Copy notation | 9[6000] | 1[6001] |
| Chained arrow notation | \(10→6\,000\) | |
| Taro's multivariable Ackermann function | A(3,19928) | A(3,19929) |
| Pound-Star Notation | #*((1249))*41 | #*((1250))*41 |
| BEAF | {10,6000} | |
| Hyper-E notation | E6,000 | |
| Bashicu matrix system | (0)(1)[3] | (0)(1)[4] |
| Hyperfactorial array notation | 2,079! | 2,080! |
| Fast-growing hierarchy | \(f_2(19\,917)\) | \(f_2(19\,918)\) |
| Hardy hierarchy | \(H_{\omega^2}(19\,917)\) | \(H_{\omega^2}(19\,918)\) |
| Slow-growing hierarchy | \(g_{\omega^{\omega^36}}(10)\) | |