81742197978

Names of 81742197978

• Cardinal: 81742197978 can be written as Eighty-one billion, seven hundred forty-two million, one hundred ninety-seven thousand, nine hundred seventy-eight.

Scientific notation

• Scientific notation: 8.1742197978 × 10¹⁰

Factors of 81742197978

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 535

Divisors of 81742197978

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 27 29 37 42 49 54 58 63 74 81 87 98 111 126 147 162 174 189 203 222 243 259 261 294 333 343 378 406 441 457 486 518 522 567 609 666 686 777 783 882 914 999 1029 1073 1134 1218 1323 1371 1421 1554 1566 1701 1813 1827 1998 2058 2146 2331 2349 2646 2742 2842 2997 3087 3199 3219 3402 3626 3654 3969 4113 4263 4662 4698 5439 5481 5994 6174 6398 6438 6993 7047 7511 7938 8226 8526 8991 9261 9597 9657 9947 10878 10962 11907 12339 12691 12789 13253 13986 14094 15022 16317 16443 16909 17982 18522 19194 19314 19894 20979 22393 22533 23814 24678 25382 25578 26506 27783 28791 28971 29841 32634 32886 33818 37017 38073 38367 39759 41958 44786 45066 48951 49329 50727 52577 55566 57582 57942 59682 62937 67179 67599 74034 76146 76734 79518 83349 86373 86913 89523 92771 97902 98658 101454 105154 111051 114219 115101 118363 119277 125874 134358 135198 146853 152181 156751 157731 166698 172746 173826 179046 185542 201537 202797 222102 228438 230202 236726 238554 259119 260739 268569 278313 293706 304362 313502 315462 342657 345303 355089 357831 368039 403074 405594 440559 456543 470253 473193 490361 518238 521478 537138 556626 604611 608391 649397 685314 690606 710178 715662 736078 777357 805707 828541 834939 881118 913086 940506 946386 980722 1027971 1065267 1073493 1104117 1209222 1216782 1298794 1369629 1410759 1419579 1471083 1554714 1611414 1657082 1669878 1813833 1825173 1948191 2055942 2130534 2146986 2208234 2417121 2485623 2504817 2739258 2821518 2839158 2942166 3083913 3195801 3220479 3312351 3432527 3627666 3650346 3896382 4108887 4232277 4258737 4413249 4545779 4834242 4971246 5009634 5441499 5799787 5844573 6167826 6391602 6440958 6624702 6865054 7456869 7514451 8217774 8464554 8517474 8826498 9091558 9587403 9937053 10297581 10882998 11599574 11689146 12696831 12776211 13239747 13637337 14913738 15028902 17399361 17533719 19174806 19874106 20595162 22370607 22543353 24027689 25393662 25552422 26479494 27274674 28762209 29811159 30892743 34798722 35067438 38090493 39719241 40912011 44741214 45086706 48055378 52198083 52601157 57524418 59622318 61785486 67111821 72083067 76180986 79438482 81824022 89433477 92678229 104396166 105202314 119157723 122736033 134223642 144166134 156594249 157803471 168193823 178866954 185356458 201335463 216249201 238315446 245472066 278034687 313188498 315606942 336387646 368208099 402670926 432498402 469782747 504581469 556069374 648747603 736416198 834104061 939565494 1009162938 1104624297 1297495206 1409348241 1513744407 1668208122 1946242809 2209248594 2818696482 3027488814 3892485618 4541233221 5838728427 9082466442 11677456854 13623699663 27247399326 40871098989 81742197978
• Sum of all divisors σ(n): 228062016000
• Sum of proper divisors (its aliquot sum) s(n): 146319818022
• 81742197978 is an abundant number, because the sum of its proper divisors (146319818022) is greater than itself. Its abundance is 64577620044

Bases of 81742197978

• Binary: 1001100001000001101101111010011011010₂
• Hexadecimal: 0x130836F4DA
• Base-36: 11JV6ZMI

Squares and roots of 81742197978

• 81742197978 squared (81742197978²) is 6681786930274547288484
• 81742197978 cubed (81742197978³) is 546183950101314926349582207485352
• The square root of 81742197978 is 285905.9250487825
• The cube root of 81742197978 is 4339.9237950545

Scales and comparisons

• 81,742,197,978 seconds is equal to 2,599 years, 7 weeks, 5 days, 6 hours, 6 minutes, 18 seconds.
• To count from 1 to 81,742,197,978 would take you about five thousand, one hundred ninety-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 81742197978 cubic inches would be around 361.7 feet tall.

Recreational maths with 81742197978

• 81742197978 backwards is 87979124718
• 81742197978 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81742197978's digits is 63
• More coming soon!