81993383874131840

Names of 81993383874131840

• Cardinal: 81993383874131840 can be written as Eighty-one quadrillion, nine hundred ninety-three trillion, three hundred eighty-three billion, eight hundred seventy-four million, one hundred thirty-one thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.199338387413184 × 10¹⁶

Factors of 81993383874131840

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 575

Divisors of 81993383874131840

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 32 40 44 55 64 80 88 110 121 128 160 176 220 242 320 352 440 484 557 605 640 704 880 968 1114 1210 1331 1408 1760 1936 2228 2420 2662 2785 3520 3872 4456 4840 5324 5570 6127 6655 7040 7744 8912 9680 10648 11140 12254 13310 15488 17824 19360 21296 22280 24508 26620 30635 35648 38720 42592 44560 49016 53240 61270 67397 71296 77440 85184 89120 98032 106480 122540 134794 170368 178240 196064 212960 245080 269588 310249 336985 356480 392128 425920 490160 539176 620498 673970 741367 784256 851840 980320 1078352 1240996 1347940 1482734 1551245 1960640 2156704 2481992 2695880 2965468 3102490 3412739 3706835 3921280 4313408 4963984 5391760 5930936 6204980 6825478 7413670 8626816 9927968 10783520 11861872 12409960 13650956 14827340 17063695 19855936 21567040 23723744 24819920 27301912 29654680 34127390 37540129 39711872 43134080 47447488 49639840 54603824 59309360 68254780 75080258 94894976 99279680 109207648 118618720 136509560 150160516 172808693 187700645 198559360 218415296 237237440 273019120 300321032 345617386 375401290 412941419 436830592 474474880 546038240 600642064 691234772 750802580 825882838 864043465 1092076480 1201284128 1382469544 1501605160 1651765676 1728086930 1900895623 2064707095 2184152960 2402568256 2764939088 3003210320 3303531352 3456173860 3801791246 4129414190 4805136512 5529878176 6006420640 6607062704 6912347720 7603582492 8258828380 9504478115 11059756352 12012841280 13214125408 13824695440 15207164984 16517656760 19008956230 20909851853 22119512704 24025682560 26428250816 27649390880 30414329968 33035313520 38017912460 41819703706 52856501632 55298781760 60828659936 66070627040 76035824920 83639407412 96254442001 104549259265 110597563520 121657319872 132141254080 152071649840 167278814824 192508884002 209098518530 230008370383 243314639744 264282508160 304143299680 334557629648 385017768004 418197037060 460016740766 481272210005 608286599360 669115259296 770035536008 836394074120 920033481532 962544420010 1058798862011 1150041851915 1216573198720 1338230518592 1540071072016 1672788148240 1840066963064 1925088840020 2117597724022 2300083703830 2676461037184 3080142144032 3345576296480 3680133926128 3850177680040 4235195448044 4600167407660 5293994310055 6160284288064 6691152592960 7360267852256 7700355360080 8470390896088 9200334815320 10587988620110 11646787482121 12320568576128 13382305185920 14720535704512 15400710720160 16940781792176 18400669630640 21175977240220 23293574964242 29441071409024 30801421440320 33881563584352 36801339261280 42351954480440 46587149928484 58233937410605 61602842880640 67763127168704 73602678522560 84703908960880 93174299856968 116467874821210 128114662303331 135526254337408 147205357045120 169407817921760 186348599713936 232935749642420 256229324606662 338815635843520 372697199427872 465871499284840 512458649213324 640573311516655 677631271687040 745394398855744 931742998569680 1024917298426648 1281146623033310 1490788797711488 1863485997139360 2049834596853296 2562293246066620 3726971994278720 4099669193706592 5124586492133240 7453943988557440 8199338387413184 10249172984266480 16398676774826368 20498345968532960 40996691937065920 81993383874131840
• Sum of all divisors σ(n): 215990023557319920
• Sum of proper divisors (its aliquot sum) s(n): 133996639683188080
• 81993383874131840 is an abundant number, because the sum of its proper divisors (133996639683188080) is greater than itself. Its abundance is 52003255809056240

Bases of 81993383874131840

• Binary: 100100011010011001000110001010111101111111111011110000000₂
• Hexadecimal: 0x1234C8C57BFF780
• Base-36: MFC88JS7ZI8

Squares and roots of 81993383874131840

• 81993383874131840 squared (81993383874131840²) is 6722914999130743263335913701785600
• 81993383874131840 cubed (81993383874131840³) is 551234550276885757819126439152881266907857813504000
• The square root of 81993383874131840 is 286344868.7756283855
• The cube root of 81993383874131840 is 434436.4638575801

Scales and comparisons

• 81,993,383,874,131,840 seconds is equal to 2,607,135,985 years, 3 days, 4 hours, 37 minutes, 20 seconds.
• To count from 1 to 81,993,383,874,131,840 would take you about seven billion, eight hundred twenty-one million, four hundred seven thousand, nine hundred fifty-five 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 81993383874131840 cubic inches would be around 36203 feet tall.

Recreational maths with 81993383874131840

• 81993383874131840 backwards is 04813147838339918
• 81993383874131840 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81993383874131840's digits is 80
• More coming soon!