81380716989

Names of 81380716989

• Cardinal: 81380716989 can be written as Eighty-one billion, three hundred eighty million, seven hundred sixteen thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 8.1380716989 × 10¹⁰

Factors of 81380716989

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 167

Divisors of 81380716989

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 11 13 19 23 31 33 39 57 67 69 93 121 143 201 209 247 253 299 341 361 363 403 429 437 589 627 713 737 741 759 871 897 1023 1083 1209 1273 1311 1541 1573 1767 2077 2139 2211 2299 2613 2717 2783 3289 3751 3819 3971 4433 4623 4693 4719 4807 5681 6231 6479 6897 7657 7843 8107 8151 8303 8349 9269 9581 9867 11191 11253 11913 13299 13547 14003 14079 14421 16549 16951 17043 19437 20033 22847 22971 23529 24187 24321 24909 27001 27807 28743 29279 29887 33573 36179 39463 40641 42009 43681 47771 48763 49647 50853 51623 52877 60099 62491 68541 71269 72561 81003 84227 86273 87837 89661 91333 101959 105391 107939 108537 118389 123101 131043 143313 145483 146289 149017 154033 154869 158631 176111 182039 186461 187473 213807 220363 251317 252681 257393 258819 266057 273999 297011 305877 314431 316173 322069 323817 369303 380627 434093 436449 447051 462099 513019 525481 528333 546117 556301 559383 567853 621023 661089 687401 749797 753951 772179 798171 891033 907649 926497 943293 966207 1004663 1121549 1141881 1187329 1302279 1354111 1539057 1576443 1600313 1639187 1668903 1703559 1863069 1937221 2002429 2062203 2249391 2423993 2722947 2779491 2831323 2926627 3013989 3267121 3346109 3364647 3458741 3542759 3561987 4062333 4186897 4775023 4800939 4917561 5643209 5780291 5811663 6007287 6119311 6831253 7231913 7271979 8247767 8493969 8779881 9747361 9801363 9984139 10038327 10376223 10628277 11799437 12560691 13060619 14325069 16929627 17245331 17340873 17603443 18357933 20493759 21309431 21695739 24743301 29242083 29952417 31144553 35398311 36807199 38046151 39181857 46055867 51735993 52810329 62075299 63928293 67312421 75143783 79551043 90725437 93433659 107220971 109825529 110421597 114138453 129793807 138167601 186225897 189698641 201937263 224189303 225431349 238653129 272176311 321662913 329476587 389381421 404879189 569095923 672567909 875061473 1179430681 1214637567 1427731877 2086685051 2466082333 2625184419 3538292043 4283195631 6260055153 7398246999 27126905663 81380716989
• Sum of all divisors σ(n): 148195418112
• Sum of proper divisors (its aliquot sum) s(n): 66814701123
• 81380716989 is a deficient number, because the sum of its proper divisors (66814701123) is less than itself. Its deficiency is 14566015866

Bases of 81380716989

• Binary: 1001011110010101010110011000110111101₂
• Hexadecimal: 0x12F2AB31BD
• Base-36: 11DVZ73X

Squares and roots of 81380716989

• 81380716989 squared (81380716989²) is 6622821097643713226121
• 81380716989 cubed (81380716989³) is 538969929416121360810029263269669
• The square root of 81380716989 is 285273.0568928653
• The cube root of 81380716989 is 4333.5169933355

Scales and comparisons

• 81,380,716,989 seconds is equal to 2,587 years, 34 weeks, 10 hours, 43 minutes, 9 seconds.
• To count from 1 to 81,380,716,989 would take you about five thousand, one hundred seventy-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 81380716989 cubic inches would be around 361.1 feet tall.

Recreational maths with 81380716989

• 81380716989 backwards is 98961708318
• The number of decimal digits it has is: 11
• The sum of 81380716989's digits is 60
• More coming soon!