81271361988

Names of 81271361988

• Cardinal: 81271361988 can be written as Eighty-one billion, two hundred seventy-one million, three hundred sixty-one thousand, nine hundred eighty-eight.

Scientific notation

• Scientific notation: 8.1271361988 × 10¹⁰

Factors of 81271361988

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4972

Divisors of 81271361988

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 9 12 18 27 36 54 81 83 108 162 166 249 324 332 498 727 747 996 1454 1494 2181 2241 2908 2988 4157 4362 4482 6543 6723 8314 8724 8964 12471 13086 13446 16628 19629 24942 26172 26892 37413 39258 49884 58887 60341 74826 78516 112239 117774 120682 149652 181023 224478 235548 241364 336717 345031 362046 448956 543069 673434 690062 724092 1035093 1086138 1346868 1380124 1629207 2070186 2172276 3022139 3105279 3258414 4140372 4887621 6044278 6210558 6516828 9066417 9315837 9775242 12088556 12421116 18132834 18631674 19550484 27199251 27947511 36265668 37263348 54398502 55895022 81597753 108797004 111790044 163195506 244793259 250837537 326391012 489586518 501675074 752512611 979173036 1003350148 1505025222 2257537833 3010050444 4515075666 6772613499 9030151332 13545226998 20317840497 27090453996 40635680994 81271361988
• Sum of all divisors σ(n): 215366703552
• Sum of proper divisors (its aliquot sum) s(n): 134095341564
• 81271361988 is an abundant number, because the sum of its proper divisors (134095341564) is greater than itself. Its abundance is 52823979576

Bases of 81271361988

• Binary: 1001011101100001001101001000111000100₂
• Hexadecimal: 0x12EC2691C4
• Base-36: 11C2VC90

Squares and roots of 81271361988

• 81271361988 squared (81271361988²) is 6605034279384531312144
• 81271361988 cubed (81271361988³) is 536800131863008970116975644382272
• The square root of 81271361988 is 285081.3252179105
• The cube root of 81271361988 is 4331.5750747637

Scales and comparisons

• 81,271,361,988 seconds is equal to 2,584 years, 9 weeks, 1 day, 18 hours, 19 minutes, 48 seconds.
• To count from 1 to 81,271,361,988 would take you about five thousand, one hundred sixty-eight 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 81271361988 cubic inches would be around 361 feet tall.

Recreational maths with 81271361988

• 81271361988 backwards is 88916317218
• 81271361988 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81271361988's digits is 54
• More coming soon!