81440093988

Names of 81440093988

• Cardinal: 81440093988 can be written as Eighty-one billion, four hundred forty million, ninety-three thousand, nine hundred eighty-eight.

Scientific notation

• Scientific notation: 8.1440093988 × 10¹⁰

Factors of 81440093988

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 243

Divisors of 81440093988

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 6 9 11 12 17 18 22 33 34 36 44 51 61 66 68 99 102 121 122 132 149 153 183 187 198 204 242 244 298 306 363 366 374 396 447 484 549 561 596 612 671 726 732 748 894 1037 1089 1098 1122 1331 1341 1342 1452 1639 1683 1788 2013 2057 2074 2178 2196 2244 2533 2662 2682 2684 3111 3278 3366 3993 4026 4114 4148 4356 4917 5066 5324 5364 6039 6171 6222 6556 6732 7381 7599 7986 8052 8228 9089 9333 9834 10132 11407 11979 12078 12342 12444 14641 14751 14762 15198 15972 18029 18178 18513 18666 19668 22143 22627 22797 22814 23958 24156 24684 27267 27863 29282 29502 29524 30396 34221 36058 36356 37026 37332 43923 44286 45254 45594 45628 47916 54087 54534 55726 58564 59004 66429 67881 68442 72116 74052 81191 81801 83589 87846 88572 90508 91188 99979 102663 108174 109068 111452 125477 131769 132858 135762 136884 154513 162261 162382 163602 167178 175692 198319 199958 203643 205326 216348 243573 248897 250767 250954 263538 265716 271524 299937 306493 309026 324522 324764 327204 334356 376431 396638 399916 407286 410652 463539 487146 497794 501534 501908 527076 594957 599874 612986 618052 649044 730719 746691 752862 793276 814572 893101 899811 919479 927078 974292 995588 1003068 1099769 1129293 1189914 1199748 1225972 1380247 1390617 1461438 1493382 1505724 1699643 1784871 1786202 1799622 1838958 1854156 2181509 2199538 2240073 2258586 2379828 2679303 2758437 2760494 2781234 2922876 2986764 3299307 3371423 3399286 3569742 3572404 3599244 3677916 4140741 4363018 4399076 4480146 4517172 5098929 5358606 5516874 5520988 5562468 6544527 6598614 6742846 6798572 7139484 8037909 8281482 8726036 8960292 9897921 10114269 10197858 10717212 11033748 12097459 12422223 13089054 13197228 13485692 15182717 15296787 16075818 16562964 18696073 19633581 19795842 20228538 20395716 24194918 24844446 26178108 30342807 30365434 30593574 32151636 36292377 37085653 37392146 39267162 39591684 40457076 45548151 48389836 49688892 56088219 60685614 60730868 61187148 72584754 74171306 74784292 78534324 91096302 108877131 111256959 112176438 121371228 133072049 136644453 145169508 148342612 168264657 182192604 205656803 217754262 222513918 224352876 266144098 273288906 333770877 336529314 399216147 411313606 435508524 445027836 532288196 546577812 616970409 667541754 673058628 798432294 822627212 1197648441 1233940818 1335083508 1596864588 1850911227 2262224833 2395296882 2467881636 3701822454 4524449666 4790593764 6786674499 7403644908 9048899332 13573348998 20360023497 27146697996 40720046994 81440093988
• Sum of all divisors σ(n): 245333907000
• Sum of proper divisors (its aliquot sum) s(n): 163893813012
• 81440093988 is an abundant number, because the sum of its proper divisors (163893813012) is greater than itself. Its abundance is 82453719024

Bases of 81440093988

• Binary: 1001011110110001101010011011100100100₂
• Hexadecimal: 0x12F6353724
• Base-36: 11EVBUP0

Squares and roots of 81440093988

• 81440093988 squared (81440093988²) is 6632488908774273744144
• 81440093988 cubed (81440093988³) is 540150520104944411599528024606272
• The square root of 81440093988 is 285377.1083811735
• The cube root of 81440093988 is 4334.5706773419

Scales and comparisons

• 81,440,093,988 seconds is equal to 2,589 years, 28 weeks, 1 day, 16 hours, 19 minutes, 48 seconds.
• To count from 1 to 81,440,093,988 would take you about five thousand, one hundred seventy-nine 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 81440093988 cubic inches would be around 361.2 feet tall.

Recreational maths with 81440093988

• 81440093988 backwards is 88939004418
• The number of decimal digits it has is: 11
• The sum of 81440093988's digits is 54
• More coming soon!