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An unvigintillion or is equal to 1066 in America, or 10126 in France and Germany.[1][2]

In the long scale, 1066 is called undecillion, which is commonly used in France and Germany.

This number is also called icosidillion in Rowlett's Greek-based naming system.[3]

Aarex Tiaokhiao gave the name vigibillion, referring to the value of this number.[4] He also give the name of this number as hencosillion.[5][6]

Sbiis Saibian uses the term viginti-untillion for this number, since the order of terms should reverse after the 20th -illion, because on thirteen ~ nineteen the one's digit comes first, while on twenty-one and onwards the ten's digit comes first.[7]

The prefix megama- has meaning of one unvigintillion.

Examples Edit

  • The number of arrangements possible on a deck of cards is equal to 52!, which is approximately 80 unvigintillion.

List of prefixed numbers derived from vigintillion Edit

Name Short scale Long scale
unvigintillion 1066 10126
duovigintillion 1069 10132
trevigintillion 1072 10138
quattuorvigintillion 1075 10144
quinvigintillion 1078 10150
sexvigintillion 1081 10156
septenvigintillion 1084 10162
octovigintillion 1087 10168
novemvigintillion 1090 10174

Sources Edit

  1. Unvigintillion at Mega Penny Project
  2. Illion Numbers by Jonathan Bowers
  3. Names for Large Numbers
  4. Aarex Tiaokhiao's illion numbers
  5. https://sites.google.com/site/aarexnumbers/home/ch2/at1i
  6. https://sites.google.com/site/aarexnumbers/home/ch2
  7. Sbiis Saibian's Ultimate Large Number List Part I

See also Edit

Main article: -illion
1–9: million · billion · trillion · quadr · quint · sext · sept · oct · non
10–19: decillion · undec · duodec · tredec · quattuordec · quindec · sexdec · septendec · octodec · novemdec
20–29: vigintillion · unvigint · duovigint · trevigint · quattuorvigint · quinvigint · sexvigint · septenvigint · octovigint · novemvigint
30–39: trigintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
40–49: quadragintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
50–59: quinquagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
60–69: sexagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
70–79: septuagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
80–89: octogintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
90–99: nonagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
100–900: centillion · primo-vigesimo-cent · ducent · trecent · quadringent · quingent · sescent · septuagintisescent · septingent · octingent · nongent
1000–1024: millillion · dumill · myr · micr · nan · pic · femt · att · zept · yoct

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