81649988157231

Names of 81649988157231

• Cardinal: 81649988157231 can be written as Eighty-one trillion, six hundred forty-nine billion, nine hundred eighty-eight million, one hundred fifty-seven thousand, two hundred thirty-one.

Scientific notation

• Scientific notation: 8.1649988157231 × 10¹³

Factors of 81649988157231

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 137

Divisors of 81649988157231

• Number of divisors d(n): 432
• Complete list of divisors:
  1 3 9 13 19 23 27 39 57 69 79 81 117 169 171 207 237 243 247 299 351 437 507 513 621 711 729 741 897 1027 1053 1311 1501 1521 1539 1817 1863 2133 2187 2223 2691 3081 3159 3211 3887 3933 4503 4563 4617 5451 5589 5681 6241 6399 6561 6669 8073 9243 9477 9633 11661 11799 13351 13509 13689 13851 16353 16767 17043 18723 19197 19513 19683 20007 23621 24219 27729 28431 28899 34523 34983 35397 40053 40527 41067 41553 49059 50301 51129 56169 57591 58539 59049 60021 70863 72657 73853 81133 83187 85293 86697 103569 104949 106191 118579 120159 121581 123201 124659 143543 147177 150903 153387 168507 172773 175617 177147 180063 212589 217971 221559 243399 249561 253669 255879 260091 307073 310707 314847 318573 355737 360477 364743 369603 373977 430629 441531 448799 452709 460161 505521 518319 526851 540189 637767 653913 664677 730197 748683 761007 767637 780273 921219 932121 944541 955719 1054729 1067211 1081431 1094229 1108809 1121931 1291887 1324593 1346397 1358127 1380483 1516563 1541527 1554957 1580553 1620567 1866059 1913301 1961739 1994031 2190591 2246049 2283021 2302911 2340819 2727317 2763657 2796363 2833623 2867157 3164187 3201633 3244293 3282687 3326427 3365793 3875661 3973779 4039191 4074381 4141449 4549689 4624581 4664871 4741659 4861701 5598177 5739903 5834387 5885217 5982093 6571773 6738147 6849063 7022457 8181951 8290971 8389089 8500869 8601471 9492561 9604899 9732879 9848061 9979281 11626983 11921337 12117573 12424347 13649067 13873743 13994613 14224977 14585103 16794531 17219709 17503161 17655651 17946279 19715319 20039851 20214441 20547189 21067371 24258767 24545853 24872913 25167267 25502607 25804413 28477683 28814697 29198637 29544183 29937843 34880949 35455121 35764011 36352719 37273041 40947201 41621229 42674931 43755309 50383593 51659127 52509483 52966953 53838837 59145957 60119553 60643323 61641567 63202113 72776301 73637559 74618739 75501801 76507821 77413239 85433049 86444091 87595911 88632549 104642847 106365363 107292033 109058157 111819123 122841603 124863687 128024793 151150779 154977381 157528449 161516511 177437871 180358659 181929969 184924701 189606339 218328903 220912677 223856217 226505403 229523463 256299147 259332273 262787733 265897647 313928541 319096089 321876099 327174471 335457369 368524809 374591061 384074379 453452337 460916573 464932143 472585347 484549533 532313613 541075977 554774103 568819017 654986709 662738031 671568651 679516209 688570389 768897441 777996819 788363199 941785623 957288267 981523413 1006372107 1105574427 1123773183 1152223137 1360357011 1382749719 1394796429 1417756041 1453648599 1596940839 1623227931 1664322309 1964960127 1988214093 2014705953 2038548627 2306692323 2333990457 2365089597 2825356869 2871864801 2944570239 3371319549 3456669411 4081071033 4148249157 4184389287 4253268123 4360945797 4790822517 4869683793 4992966927 5894880381 5964642279 6044117859 6115645881 6920076969 7001971371 8476070607 8615594403 8833710717 10113958647 12243213099 12444747471 12759804369 13082837391 14372467551 14609051379 14978900781 17684641143 17893926837 18132353577 20760230907 21005914113 25428211821 25846783209 26501132151 30341875941 36729639297 37334242413 38279413107 43827154137 44936702343 53053923429 53681780511 54397060731 62280692721 77540349627 79503396453 91025627823 110188917891 112002727239 114838239321 131481462411 159161770287 161045341533 186842078163 232621048881 273076883469 330566753673 336008181717 344514717963 394444387233 477485310861 483136024599 697863146643 1008024545151 1033544153889 1183333161699 1432455932583 2093589439929 3024073635453 3549999485097 4297367797749 6280768319787 9072220906359 27216662719077 81649988157231
• Sum of all divisors σ(n): 147537479980800
• Sum of proper divisors (its aliquot sum) s(n): 65887491823569
• 81649988157231 is a deficient number, because the sum of its proper divisors (65887491823569) is less than itself. Its deficiency is 15762496333662

Bases of 81649988157231

• Binary: 10010100100001010011110100010100011111100101111₂
• Hexadecimal: 0x4A429E8A3F2F
• Base-36: SXXHIT3XR

Squares and roots of 81649988157231

• 81649988157231 squared (81649988157231²) is 6666720566075962551177587361
• 81649988157231 cubed (81649988157231³) is 544337655267670690716789061778804906357391
• The square root of 81649988157231 is 9036038.2998984129
• The cube root of 81649988157231 is 43382.9128791163

Scales and comparisons

• 81,649,988,157,231 seconds is equal to 2,596,217 years, 3 weeks, 2 days, 1 hour, 53 minutes, 51 seconds.
• To count from 1 to 81,649,988,157,231 would take you about six million, four hundred ninety thousand, five hundred forty-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 81649988157231 cubic inches would be around 3615.2 feet tall.

Recreational maths with 81649988157231

• 81649988157231 backwards is 13275188994618
• The number of decimal digits it has is: 14
• The sum of 81649988157231's digits is 72
• More coming soon!