81989390773074231

Names of 81989390773074231

• Cardinal: 81989390773074231 can be written as Eighty-one quadrillion, nine hundred eighty-nine trillion, three hundred ninety billion, seven hundred seventy-three million, seventy-four thousand, two hundred thirty-one.

Scientific notation

• Scientific notation: 8.1989390773074231 × 10¹⁶

Factors of 81989390773074231

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 10003417819

Divisors of 81989390773074231

• Number of divisors d(n): 28
• Complete list of divisors:
  1 3 9 27 81 243 729 11243 33729 101187 303561 910683 2732049 8196147 10003406573 30010219719 90030659157 270091977471 810275932413 2430827797239 7292483391717 112468300100239 337404900300717 1012214700902151 3036644102706453 9109932308119359 27329796924358077 81989390773074231
• Sum of all divisors σ(n): 122938785745235208
• Sum of proper divisors (its aliquot sum) s(n): 40949394972160977
• 81989390773074231 is a deficient number, because the sum of its proper divisors (40949394972160977) is less than itself. Its deficiency is 41039995800913254

Bases of 81989390773074231

• Binary: 100100011010010001110101010100000011000010011100100110111₂
• Hexadecimal: 0x12348EAA0613937
• Base-36: MFATA56Y8FR

Squares and roots of 81989390773074231

• 81989390773074231 squared (81989390773074231²) is 6722260199339869846461946636241361
• 81989390773074231 cubed (81989390773074231³) is 551154018361960465577385252111638547735116885468391
• The square root of 81989390773074231 is 286337896.1525599933
• The cube root of 81989390773074231 is 434429.4113500767

Scales and comparisons

• 81,989,390,773,074,231 seconds is equal to 2,607,009,016 years, 38 weeks, 5 days, 18 hours, 23 minutes, 51 seconds.
• To count from 1 to 81,989,390,773,074,231 would take you about seven billion, eight hundred twenty-one million, twenty-seven thousand and fifty 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 81989390773074231 cubic inches would be around 36202.5 feet tall.

Recreational maths with 81989390773074231

• 81989390773074231 backwards is 13247037709398918
• 81989390773074231 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81989390773074231's digits is 81
• More coming soon!