81988672409912

Names of 81988672409912

• Cardinal: 81988672409912 can be written as Eighty-one trillion, nine hundred eighty-eight billion, six hundred seventy-two million, four hundred nine thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 8.1988672409912 × 10¹³

Factors of 81988672409912

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 21285

Divisors of 81988672409912

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 4 8 17 34 68 79 136 158 289 316 578 632 1156 1343 2312 2686 5372 10744 21187 22831 42374 45662 84748 91324 169496 182648 360179 720358 1440716 1673773 2881432 3347546 6123043 6695092 12246086 13390184 24492172 28454141 48984344 56908282 113816564 227633128 448888969 483720397 897777938 967440794 1795555876 1934881588 3591111752 3869763176 7631112473 15262224946 30524449892 35462228551 61048899784 70924457102 129728912041 141848914204 259457824082 283697828408 518915648164 602857885367 1037831296328 1205715770734 2411431541468 4822863082936 10248584051239 20497168102478 40994336204956 81988672409912
• Sum of all divisors σ(n): 165378501838800
• Sum of proper divisors (its aliquot sum) s(n): 83389829428888
• 81988672409912 is an abundant number, because the sum of its proper divisors (83389829428888) is greater than itself. Its abundance is 1401157018976

Bases of 81988672409912

• Binary: 10010101001000101111001101100011101000100111000₂
• Hexadecimal: 0x4A9179B1D138
• Base-36: T292QO1TK

Squares and roots of 81988672409912

• 81988672409912 squared (81988672409912²) is 6722142403539865201755847744
• 81988672409912 cubed (81988672409912³) is 551139531416608483870807249346899028438528
• The square root of 81988672409912 is 9054759.6550053165
• The cube root of 81988672409912 is 43442.8142572111

Scales and comparisons

• 81,988,672,409,912 seconds is equal to 2,606,986 years, 9 weeks, 16 hours, 58 minutes, 32 seconds.
• To count from 1 to 81,988,672,409,912 would take you about six million, five hundred seventeen thousand, four hundred sixty-five years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 81988672409912 cubic inches would be around 3620.2 feet tall.

Recreational maths with 81988672409912

• 81988672409912 backwards is 21990427688918
• The number of decimal digits it has is: 14
• The sum of 81988672409912's digits is 74
• More coming soon!