81018869727085568

Names of 81018869727085568

• Cardinal: 81018869727085568 can be written as Eighty-one quadrillion, eighteen trillion, eight hundred sixty-nine billion, seven hundred twenty-seven million, eighty-five thousand, five hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1018869727085568 × 10¹⁶

Factors of 81018869727085568

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 3068

Divisors of 81018869727085568

• Number of divisors d(n): 704
• Complete list of divisors:
  1 2 4 8 16 29 32 58 64 83 116 127 128 166 181 232 254 256 332 362 464 508 512 664 724 757 928 1016 1024 1328 1448 1514 1856 1889 2032 2407 2656 2896 3028 3683 3712 3778 4064 4814 5249 5312 5792 6056 7366 7424 7556 8128 9628 10498 10541 10624 11584 12112 14732 14848 15023 15112 16256 19256 20996 21082 21248 21953 22987 23168 24224 29464 29696 30046 30224 32512 38512 41992 42164 42496 43906 45974 46336 48448 54781 58928 60092 60448 62831 65024 77024 83984 84328 84992 87812 91948 92672 96139 96896 109562 117856 120184 120896 125662 130048 137017 154048 156787 167968 168656 175624 183896 185344 192278 193792 219124 235712 239903 240368 241792 251324 274034 305689 308096 313574 335936 337312 341909 351248 367792 384556 387584 435667 438248 471424 479806 480736 483584 502648 548068 611378 616192 627148 666623 671872 674624 683818 702496 735584 769112 775168 871334 876496 942848 959612 961472 967168 1005296 1096136 1222756 1232384 1254296 1333246 1343744 1349248 1367636 1404992 1429973 1471168 1538224 1742668 1752992 1822099 1885696 1907921 1919224 1922944 1934336 2010592 2192272 2445512 2464768 2508592 2666492 2687488 2698496 2735272 2788031 2809984 2859946 2942336 3076448 3485336 3505984 3644198 3771392 3815842 3838448 3845888 3973493 4021184 4384544 4546823 4891024 5017184 5332984 5374976 5396992 5470544 5576062 5619968 5719892 5884672 6152896 6957187 6970672 7011968 7288396 7631684 7676896 7691776 7946986 7979537 8042368 8769088 9093646 9782048 9915361 10034368 10665968 10793984 10941088 11152124 11239936 11372411 11439784 11769344 12305792 13914374 13941344 14023936 14576792 15263368 15353792 15383552 15893972 15959074 16084736 17401159 17538176 18187292 19564096 19830722 19911949 20068736 21331936 21882176 22304248 22479872 22744822 22879568 23538688 24611584 27828748 27882688 28047872 28378447 29153584 30526736 30707584 31787944 31918148 32169472 34802318 35076352 36374584 39128192 39661444 39823898 40137472 41469217 42663872 43422443 43764352 44608496 45489644 45759136 49223168 55329709 55657496 55765376 56095744 56756894 58307168 61053472 61415168 63575888 63836296 64338944 69604636 70152704 72749168 78256384 79322888 79647796 80274944 82938434 85327744 86844886 87528704 89216992 90979288 91518272 98446336 110659418 111314992 111530752 113513788 116614336 118687759 122106944 122830336 127151776 127672592 139209272 140305408 145498336 156512768 158645776 159295592 160549888 165876868 170655488 173689772 175057408 178433984 181606571 181958576 183036544 221318836 222629984 223061504 227027576 231406573 233228672 237375518 244213888 245660672 254303552 255345184 258825113 278418544 290996672 313025536 317291552 318591184 329799919 331753736 341310976 347379544 350114816 356867968 363213142 363917152 366073088 442637672 445259968 446123008 454055152 462813146 466457344 474751036 488427776 504633611 508607104 510690368 517650226 556837088 577446521 581993344 634583104 637182368 659599838 663507472 682621952 694759088 713735936 726426284 727834304 732146176 822974963 885275344 890519936 908110304 925626292 932914688 949502072 976855552 1009267222 1017214208 1021380736 1035300452 1113674176 1154893042 1163986688 1259250847 1269166208 1274364736 1319199676 1327014944 1389518176 1427471872 1444296197 1452852568 1455668608 1464292352 1645949926 1770550688 1781039872 1816220608 1851252584 1865829376 1899004144 1953711104 2018534444 2034428416 2042761472 2070600904 2227348352 2309786084 2327973376 2518501694 2538332416 2548729472 2638399352 2654029888 2779036352 2854943744 2888592394 2905705136 2911337216 3291899852 3441945011 3541101376 3562079744 3604062769 3632441216 3702505168 3798008288 4037068888 4068856832 4085522944 4141201808 4454696704 4619572168 4655946752 5037003388 5076664832 5097458944 5266590559 5276798704 5308059776 5558072704 5777184788 5811410272 5822674432 6583799704 6883890022 7082202752 7124159488 7208125538 7264882432 7405010336 7505928277 7596016576 8074137776 8171045888 8282403616 8909393408 9239144336 10074006776 10153329664 10194917888 10533181118 10553597408 10616119552 11116145408 11554369576 11622820544 11645348864 13167599408 13767780044 14164405504 14416251076 14529764864 14810020672 15011856554 15073345393 15192033152 16148275552 16564807232 17818786816 18478288672 20148013552 20389835776 21066362236 21107194816 21232239104 21482484379 22232290816 23108739152 23245641088 26335198816 27535560088 28328811008 28832502152 29059529728 29620041344 30023713108 30146690786 30384066304 32296551104 32870789351 33129614464 36956577344 40296027104 41884589713 42132724472 42214389632 42464478208 42964968758 44464581632 46217478304 46491282176 52670397632 55071120176 56657622016 57665004304 59240082688 60047426216 60293381572 60768132608 64593102208 65741578702 66259228928 73913154688 80592054208 83769179426 84265448944 84428779264 85929937516 92434956608 92982564352 104517820301 105340795264 110142240352 115330008608 118480165376 120094852432 120586763144 121536265216 129186204416 131483157404 132518457856 147826309376 161184108416 167538358852 168530897888 168857558528 171859875032 184869913216 185965128704 209035640602 210681590528 220284480704 230660017216 236960330752 240189704864 241173526288 258372408832 262966314808 265036915712 295652618752 322368216832 335076717704 337061795776 337715117056 343719750064 369739826432 418071281204 421363181056 437127016397 440568961408 461320034432 480379409728 482347052576 516744817664 525932629616 591305237504 622992046991 644736433664 670153435408 674123591552 687439500128 739479652864 836142562408 842726362112 874254032794 881137922816 922640068864 953252891179 960758819456 964694105152 1051865259232 1245984093982 1289472867328 1340306870816 1348247183104 1374879000256 1478959305728 1672285124816 1748508065588 1762275845632 1845280137728 1906505782358 1921517638912 1929388210304 2103730518464 2491968187964 2680613741632 2696494366208 2728275516133 2749758000512 3344570249632 3497016131176 3524551691264 3690560275456 3813011564716 3843035277824 3858776420608 4207461036928 4983936375928 5361227483264 5392988732416 5456551032266 5499516001024 6689140499264 6994032262352 7626023129432 7686070555648 7717552841216 8414922073856 9967872751856 10722454966528 10913102064532 10999032002048 13378280998528 13988064524704 15252046258864 15435105682432 16829844147712 19935745503712 21444909933056 21826204129064 21998064004096 26756561997056 27976129049408 30504092517728 33659688295424 39871491007424 42889819866112 43652408258128 53513123994112 55952258098816 61008185035456 79119989967857 79742982014848 87304816516256 107026247988224 111904516197632 122016370070912 158239979935714 159485964029696 174609633032512 223809032395264 244032740141824 316479959871428 318971928059392 349219266065024 447618064790528 488065480283648 632959919742856 637943856118784 698438532130048 976130960567296 1265919839485712 1396877064260096 2531839678971424 2793754128520192 5063679357942848 10127358715885696 20254717431771392 40509434863542784 81018869727085568
• Sum of all divisors σ(n): 172159404150988800
• Sum of proper divisors (its aliquot sum) s(n): 91140534423903232
• 81018869727085568 is an abundant number, because the sum of its proper divisors (91140534423903232) is greater than itself. Its abundance is 10121664696817664

Bases of 81018869727085568

• Binary: 100011111110101100011101110010110001011111100010000000000₂
• Hexadecimal: 0x11FD63B962FC400
• Base-36: M5QSIXIA328

Squares and roots of 81018869727085568

• 81018869727085568 squared (81018869727085568²) is 6564057251854462299818607193882624
• 81018869727085568 cubed (81018869727085568³) is 531812499369127983483563234601832223765289796370432
• The square root of 81018869727085568 is 284638138.2160260829
• The cube root of 81018869727085568 is 432708.4670709063

Scales and comparisons

• 81,018,869,727,085,568 seconds is equal to 2,576,149,449 years, 26 weeks, 1 day, 1 hour, 6 minutes, 8 seconds.
• To count from 1 to 81,018,869,727,085,568 would take you about seven billion, seven hundred twenty-eight million, four hundred forty-eight thousand, three hundred forty-eight 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 81018869727085568 cubic inches would be around 36059 feet tall.

Recreational maths with 81018869727085568

• 81018869727085568 backwards is 86558072796881018
• The number of decimal digits it has is: 17
• The sum of 81018869727085568's digits is 89
• More coming soon!