81886749642720

Names of 81886749642720

• Cardinal: 81886749642720 can be written as Eighty-one trillion, eight hundred eighty-six billion, seven hundred forty-nine million, six hundred forty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.188674964272 × 10¹³

Factors of 81886749642720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 6234

Divisors of 81886749642720

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 27 30 32 33 36 40 44 45 48 54 55 60 66 72 80 88 90 96 99 108 110 120 132 135 144 160 165 176 180 191 198 216 220 240 264 270 288 297 330 352 360 382 396 432 440 480 495 528 540 573 594 660 720 764 792 864 880 955 990 1056 1080 1146 1188 1320 1440 1485 1528 1584 1719 1760 1910 1980 2101 2160 2292 2376 2640 2801 2865 2970 3056 3168 3221 3438 3820 3960 4202 4320 4584 4752 5157 5280 5602 5730 5940 6112 6303 6442 6876 7640 7920 8403 8404 8595 9168 9504 9663 10314 10505 11204 11460 11880 12606 12884 13752 14005 15280 15840 16105 16806 16808 17190 18336 18909 19326 20628 21010 22408 22920 23760 25209 25212 25768 25785 27504 28010 28989 30560 30811 31515 32210 33612 33616 34380 35431 37818 38652 41256 42015 42020 44816 45840 47520 48315 50418 50424 51536 51570 55008 56020 56727 57978 61622 63030 64420 67224 67232 68760 70862 75627 75636 77304 82512 84030 84040 86967 89632 91680 92433 94545 96630 100836 100848 103072 103140 106293 112040 113454 115956 123244 126045 126060 128840 134448 137520 141724 144945 151254 151272 154055 154608 165024 168060 168080 173934 177155 184866 189090 193260 201672 201696 206280 212586 224080 226908 231912 246488 252090 252120 257680 268896 275040 277299 283448 283635 289890 302508 302544 308110 309216 318879 336120 336160 347868 354310 369732 378135 378180 386520 403344 412560 425172 434835 448160 453816 462165 463824 492976 504180 504240 515360 531465 534991 554598 566896 567270 579780 605016 605088 615211 616220 637758 672240 695736 708620 739464 756270 756360 773040 806688 825120 831897 850344 869670 907632 924330 927648 956637 985952 1008360 1008480 1062930 1069982 1109196 1133792 1134540 1159560 1210032 1230422 1232440 1275516 1344480 1386495 1391472 1417240 1478928 1512540 1512720 1546080 1594395 1604973 1663794 1700688 1739340 1815264 1845633 1848660 1913274 2016720 2125860 2139964 2218392 2269080 2319120 2420064 2460844 2464880 2551032 2674955 2772990 2782944 2834480 2957856 3025080 3025440 3076055 3188790 3209946 3327588 3401376 3478680 3691266 3697320 3826548 4033440 4159485 4251720 4279928 4436784 4538160 4638240 4783185 4814919 4921688 4929760 5102064 5349910 5536899 5545980 5668960 5884901 6050160 6152110 6377580 6419892 6655176 6767321 6957360 7382532 7394640 7653096 8024865 8318970 8503440 8559856 8873568 9022021 9076320 9228165 9566370 9629838 9843376 10204128 10699820 11073798 11091960 11769802 12100320 12304220 12755160 12839784 13310352 13534642 13914720 14444757 14765064 14789280 15306192 16049730 16610697 16637940 17006880 17119712 17654703 18044042 18456330 19132740 19259676 19686752 20301963 21399640 22147596 22183920 23539604 24074595 24608440 25510320 25679568 26620704 27066063 27069284 27684495 28889514 29424505 29530128 30612384 32099460 33221394 33275880 33836605 35309406 36088084 36912660 38265480 38519352 40603926 42799280 44295192 44367840 45110105 47079208 48149190 49216880 51020640 51359136 52964109 54132126 54138568 55368990 57779028 58849010 59060256 60905889 64198920 66442788 66551760 67673210 70618812 72176168 72223785 73825320 76530960 77038704 81198189 81207852 83053485 85598560 88273515 88590384 90220210 94158416 96298380 98433760 99242231 101509815 105928218 108264252 108277136 110737980 115558056 117698020 121811778 128397840 132885576 133103520 135330315 135346420 141237624 144352336 144447570 147650640 153061920 154077408 158892327 162396378 162415704 166106970 176547030 177180768 180440420 182717667 188316832 192596760 198484462 203019630 211856436 216528504 216554272 221475960 231116112 235396040 243594567 243623556 256795680 264820545 265771152 270660630 270692840 282475248 288704672 288895140 295301280 297726693 304529445 317784654 324792756 324831408 332213940 353094060 360880840 365435334 385193520 396968924 405990945 406039260 423712872 433057008 442951920 462232224 470792080 487189134 487247112 496211155 529641090 531542304 541321260 541385680 564950496 577790280 595453386 609058890 635569308 649585512 649662816 664427880 706188120 721761680 730870668 770387040 793937848 794461635 811981890 812078520 847425744 866114016 885903840 893180079 913588335 941584160 974378268 974494224 992422310 1059282180 1082642520 1082771360 1155580560 1190906772 1217972835 1218117780 1271138616 1299171024 1328855760 1412376240 1443523360 1461741336 1488633465 1587875696 1588923270 1623963780 1624157040 1694851488 1723206011 1786360158 1827176670 1948756536 1948988448 1984844620 2118564360 2165285040 2311161120 2381813544 2435945670 2436235560 2542277232 2598342048 2657711520 2679540237 2824752480 2923482672 2977266930 3175751392 3177846540 3247927560 3248314080 3446412022 3572720316 3654353340 3897513072 3969689240 4237128720 4330570080 4465900395 4763627088 4871891340 4872471120 5084554464 5169618033 5359080474 5846965344 5954533860 6355693080 6495855120 6892824044 7145440632 7308706680 7795026144 7939378480 8474257440 8616030055 8931800790 9527254176 9743782680 9744942240 10339236066 10718160948 11909067720 12711386160 12991710240 13397701185 13785648088 14290881264 14617413360 15508854099 15878756960 17232060110 17863601580 18955266121 19487565360 20678472132 21436321896 23818135440 25422772320 25848090165 26795402370 27571296176 28581762528 29234826720 31017708198 34464120220 35727203160 37910532242 38975130720 41356944264 42872643792 46526562297 47636270880 51696180330 53590804740 55142592352 56865798363 62035416396 68928240440 71454406320 75821064484 77544270495 82713888528 85745287584 93053124594 94776330605 103392360660 107181609480 113731596726 124070832792 137856480880 142908812640 151642128968 155088540990 165427777056 170597395089 186106249188 189552661210 206784721320 214363218960 227463193452 232632811485 248141665584 275712961760 284328991815 303284257936 310177081980 341194790178 372212498376 379105322420 413569442640 428726437920 454926386904 465265622970 496283331168 511792185267 568657983630 606568515872 620354163960 682389580356 744424996752 758210644840 827138885280 852986975445 909852773808 930531245940 1023584370534 1137315967260 1240708327920 1364779160712 1488849993504 1516421289680 1705973950890 1819705547616 1861062491880 2047168741068 2274631934520 2481416655840 2558960926335 2729558321424 3032842579360 3411947901780 3722124983760 4094337482136 4549263869040 5117921852670 5459116642848 6823895803560 7444249967520 8188674964272 9098527738080 10235843705340 13647791607120 16377349928544 20471687410680 27295583214240 40943374821360 81886749642720
• Sum of all divisors σ(n): 314505274245120
• Sum of proper divisors (its aliquot sum) s(n): 232618524602400
• 81886749642720 is an abundant number, because the sum of its proper divisors (232618524602400) is greater than itself. Its abundance is 150731774959680

Bases of 81886749642720

• Binary: 10010100111100110111110100111111100111111100000₂
• Hexadecimal: 0x4A79BE9FCFE0
• Base-36: T0Y94HFC0

Squares and roots of 81886749642720

• 81886749642720 squared (81886749642720²) is 6705439767049504047648998400
• 81886749642720 cubed (81886749642720³) is 549086667448721455602374813587165851648000
• The square root of 81886749642720 is 9049129.7726753815
• The cube root of 81886749642720 is 43424.8050706287

Scales and comparisons

• 81,886,749,642,720 seconds is equal to 2,603,745 years, 18 weeks, 1 hour, 12 minutes.
• To count from 1 to 81,886,749,642,720 would take you about six million, five hundred nine thousand, three hundred sixty-three 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 81886749642720 cubic inches would be around 3618.7 feet tall.

Recreational maths with 81886749642720

• 81886749642720 backwards is 02724694768818
• 81886749642720 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81886749642720's digits is 72
• More coming soon!