81429420707334981

Names of 81429420707334981

• Cardinal: 81429420707334981 can be written as Eighty-one quadrillion, four hundred twenty-nine trillion, four hundred twenty billion, seven hundred seven million, three hundred thirty-four thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 8.1429420707334981 × 10¹⁶

Factors of 81429420707334981

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 187869494

Divisors of 81429420707334981

• Number of divisors d(n): 24
• Complete list of divisors:
  1 3 9 3691 11073 13049 33219 39147 117441 48163859 144491577 187852751 433474731 563558253 1690674759 693364503941 2080093511823 2451290547799 6240280535469 7353871643397 22061614930191 9047713411926109 27143140235778327 81429420707334981
• Sum of all divisors σ(n): 117661157939145600
• Sum of proper divisors (its aliquot sum) s(n): 36231737231810619
• 81429420707334981 is a deficient number, because the sum of its proper divisors (36231737231810619) is less than itself. Its deficiency is 45197683475524362

Bases of 81429420707334981

• Binary: 100100001010010111010000001101111100001101100101101000101₂
• Hexadecimal: 0x1214BA06F86CB45
• Base-36: M9SBJG3T3R9

Squares and roots of 81429420707334981

• 81429420707334981 squared (81429420707334981²) is 6630750556732154997404815346270361
• 81429420707334981 cubed (81429420707334981³) is 539938176689538295850653896032284771683274218798141
• The square root of 81429420707334981 is 285358407.4586466097
• The cube root of 81429420707334981 is 433438.1310702771

Scales and comparisons

• 81,429,420,707,334,981 seconds is equal to 2,589,203,700 years, 39 weeks, 2 days, 15 hours, 16 minutes, 21 seconds.
• To count from 1 to 81,429,420,707,334,981 would take you about seven billion, seven hundred sixty-seven million, six hundred eleven thousand, one hundred two 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 81429420707334981 cubic inches would be around 36119.8 feet tall.

Recreational maths with 81429420707334981

• 81429420707334981 backwards is 18943370702492418
• The number of decimal digits it has is: 17
• The sum of 81429420707334981's digits is 72
• More coming soon!