81627890451526440

Names of 81627890451526440

• Cardinal: 81627890451526440 can be written as Eighty-one quadrillion, six hundred twenty-seven trillion, eight hundred ninety billion, four hundred fifty-one million, five hundred twenty-six thousand, four hundred forty.

Scientific notation

• Scientific notation: 8.162789045152644 × 10¹⁶

Factors of 81627890451526440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 46311905

Divisors of 81627890451526440

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 56 60 63 70 72 84 90 105 120 126 140 168 180 210 252 280 315 360 420 504 630 840 1260 2520 710327 1420654 2130981 2841308 3551635 4261962 4972289 5682616 6392943 7103270 8523924 9944578 10654905 12785886 14206540 14916867 17047848 19889156 21309810 24861445 25571772 28413080 29833734 31964715 39778312 42619620 44750601 45601561 49722890 51143544 59667468 63929430 74584335 85239240 89501202 91203122 99445780 119334936 127858860 136804683 149168670 179002404 182406244 198891560 223753005 228007805 255717720 273609366 298337340 319210927 358004808 364812488 410414049 447506010 456015610 547218732 596674680 638421854 684023415 820828098 895012020 912031220 957632781 1094437464 1276843708 1368046830 1596054635 1641656196 1790024040 1824062440 1915265562 2052070245 2553687416 2736093660 2872898343 3192109270 3283312392 3830531124 4104140490 4788163905 5472187320 5745796686 6384218540 7661062248 8208280980 9576327810 11491593372 12768437080 14364491715 16416561960 19152655620 22983186744 28728983430 38305311240 57457966860 114915933720 32392020020447 64784040040894 97176060061341 129568080081788 161960100102235 194352120122682 226744140143129 259136160163576 291528180184023 323920200204470 388704240245364 453488280286258 485880300306705 583056360368046 647840400408940 680232420429387 777408480490728 906976560572516 971760600613410 1133720700715645 1166112720736092 1295680800817880 1360464840858774 1457640900920115 1813953121145032 1943521201226820 2040697261288161 2267441401431290 2332225441472184 2720929681717548 2915281801840230 3401162102146935 3887042402453640 4081394522576322 4534882802862580 5441859363435096 5830563603680460 6802324204293870 8162789045152644 9069765605725160 10203486306440805 11661127207360920 13604648408587740 16325578090305288 20406972612881610 27209296817175480 40813945225763220 81627890451526440
• Sum of all divisors σ(n): 303189740870664960
• Sum of proper divisors (its aliquot sum) s(n): 221561850419138520
• 81627890451526440 is an abundant number, because the sum of its proper divisors (221561850419138520) is greater than itself. Its abundance is 139933959967612080

Bases of 81627890451526440

• Binary: 100100010000000000010001001000110001000001011001100101000₂
• Hexadecimal: 0x12200224620B328
• Base-36: MBQO76T5VE0

Squares and roots of 81627890451526440

• 81627890451526440 squared (81627890451526440²) is 6663112499566401356699326019073600
• 81627890451526440 cubed (81627890451526440³) is 543895817180802723889222095560694550495674705984000
• The square root of 81627890451526440 is 285705951.0257468193
• The cube root of 81627890451526440 is 433789.9881715485

Scales and comparisons

• 81,627,890,451,526,440 seconds is equal to 2,595,514,424 years, 37 weeks, 1 day, 8 hours, 54 minutes.
• To count from 1 to 81,627,890,451,526,440 would take you about seven billion, seven hundred eighty-six million, five hundred forty-three thousand, two hundred seventy-four 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 81627890451526440 cubic inches would be around 36149.2 feet tall.

Recreational maths with 81627890451526440

• 81627890451526440 backwards is 04462515409872618
• 81627890451526440 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81627890451526440's digits is 72
• More coming soon!