81731080318867800

Names of 81731080318867800

• Cardinal: 81731080318867800 can be written as Eighty-one quadrillion, seven hundred thirty-one trillion, eighty billion, three hundred eighteen million, eight hundred sixty-seven thousand, eight hundred.

Scientific notation

• Scientific notation: 8.17310803188678 × 10¹⁶

Factors of 81731080318867800

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 35063

Divisors of 81731080318867800

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 19 20 24 25 30 38 40 50 57 60 75 76 95 100 114 120 150 152 190 200 228 285 300 313 361 380 456 475 570 600 626 722 760 939 950 1083 1140 1252 1425 1444 1565 1805 1878 1900 2166 2280 2504 2850 2888 3130 3610 3756 3800 4332 4695 5415 5700 5947 6260 7220 7512 7825 8664 9025 9390 10830 11400 11894 12520 14440 15650 17841 18050 18780 21660 23475 23788 27075 29735 31300 34721 35682 36100 37560 43320 46950 47576 54150 59470 62600 69442 71364 72200 89205 93900 104163 108300 112993 118940 138884 142728 148675 173605 178410 187800 208326 216600 225986 237880 277768 297350 338979 347210 356820 416652 446025 451972 520815 564965 594700 659699 677958 694420 713640 833304 868025 892050 903944 1041630 1129930 1189400 1319398 1355916 1388840 1694895 1736050 1784100 1979097 2083260 2259860 2604075 2638796 2711832 2824825 3298495 3389790 3472100 3568200 3958194 4166520 4519720 5208150 5277592 5649650 6596990 6779580 6944200 7916388 8474475 9895485 10416300 10867673 11299300 12534281 13193980 13559160 15832776 16492475 16948950 19790970 20832600 21735346 22598600 25068562 26387960 32603019 32984950 33897900 37602843 39581940 43470692 49477425 50137124 54338365 62671405 65206038 65969900 67795800 75205686 79163880 86941384 98954850 100274248 108676730 125342810 130412076 131939800 150411372 163015095 188014215 197909700 206485787 217353460 250685620 260824152 271691825 300822744 313357025 326030190 376028430 395819400 412971574 434706920 501371240 543383650 619457361 626714050 652060380 752056860 815075475 825943148 940071075 1032428935 1086767300 1205547841 1238914722 1253428100 1304120760 1504113720 1630150950 1651886296 1880142150 2064857870 2173534600 2411095682 2477829444 2506856200 3097286805 3260301900 3616643523 3760284300 3923229953 4129715740 4822191364 4955658888 5162144675 6027739205 6194573610 6520603800 7233287046 7520568600 7846459906 8259431480 9644382728 10324289350 11769689859 12055478410 12389147220 14466574092 15486434025 15692919812 18083217615 19616149765 20648578700 22905408979 23539379718 24110956820 24778294440 28933148184 30138696025 30972868050 31385839624 36166435230 39232299530 41297157400 45810817958 47078759436 48221913640 58848449295 60277392050 61945736100 68716226937 72332870460 78464599060 90416088075 91621635916 94157518872 98080748825 114527044895 117696898590 120554784100 123891472200 137432453874 144665740920 156929198120 180832176150 183243271832 196161497650 229054089790 235393797180 241109568200 274864907748 294242246475 343581134685 361664352300 377336474233 392322995300 435202770601 458108179580 470787594360 549729815496 572635224475 588484492950 687162269370 723328704600 754672948466 784645990600 870405541202 916216359160 1132009422699 1145270448950 1176968985900 1305608311803 1374324538740 1509345896932 1717905673425 1740811082404 1886682371165 2176013853005 2264018845398 2290540897900 2353937971800 2611216623606 2748649077480 3018691793864 3435811346850 3481622164808 3773364742330 4352027706010 4528037690796 4581081795800 5222433247212 5660047113495 6528041559015 6871622693700 7169393010427 7546729484660 8704055412020 9056075381592 9433411855825 10444866494424 10880069265025 11320094226990 13056083118030 13743245387400 14338786020854 15093458969320 17408110824040 18866823711650 21508179031281 21760138530050 22640188453980 26112166236060 28300235567475 28677572041708 32640207795075 35846965052135 37733647423300 43016358062562 43520277060100 45280376907960 52224332472120 56600471134950 57355144083416 65280415590150 71693930104270 75467294846600 86032716125124 87040554120200 107540895156405 113200942269900 130560831180300 136218467198113 143387860208540 172065432250248 179234825260675 215081790312810 226401884539800 261121662360600 272436934396226 286775720417080 358469650521350 408655401594339 430163580625620 537704475782025 544873868792452 681092335990565 716939301042700 817310803188678 860327161251240 1075408951564050 1089747737584904 1362184671981130 1433878602085400 1634621606377356 2043277007971695 2150817903128100 2724369343962260 3269243212754712 3405461679952825 4086554015943390 4301635806256200 5448738687924520 6810923359905650 8173108031886780 10216385039858475 13621846719811300 16346216063773560 20432770079716950 27243693439622600 40865540159433900 81731080318867800
• Sum of all divisors σ(n): 268265315676012120
• Sum of proper divisors (its aliquot sum) s(n): 186534235357144320
• 81731080318867800 is an abundant number, because the sum of its proper divisors (186534235357144320) is greater than itself. Its abundance is 104803155038276520

Bases of 81731080318867800

• Binary: 100100010010111011111110000001001100000111101100101011000₂
• Hexadecimal: 0x1225DFC0983D958
• Base-36: MCR8ZYJW7KO

Squares and roots of 81731080318867800

• 81731080318867800 squared (81731080318867800²) is 6679969490089219444124673876840000
• 81731080318867800 cubed (81731080318867800³) is 545961122922068376897180458467177872025441752000000
• The square root of 81731080318867800 is 285886481.5252162287
• The cube root of 81731080318867800 is 433972.7030175749

Scales and comparisons

• 81,731,080,318,867,800 seconds is equal to 2,598,795,543 years, 16 weeks, 16 hours, 10 minutes.
• To count from 1 to 81,731,080,318,867,800 would take you about seven billion, seven hundred ninety-six million, three hundred eighty-six thousand, six hundred twenty-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 81731080318867800 cubic inches would be around 36164.4 feet tall.

Recreational maths with 81731080318867800

• 81731080318867800 backwards is 00876881308013718
• The number of decimal digits it has is: 17
• The sum of 81731080318867800's digits is 69
• More coming soon!