81012941729906816

Names of 81012941729906816

• Cardinal: 81012941729906816 can be written as Eighty-one quadrillion, twelve trillion, nine hundred forty-one billion, seven hundred twenty-nine million, nine hundred six thousand, eight hundred sixteen.

Scientific notation

• Scientific notation: 8.1012941729906816 × 10¹⁶

Factors of 81012941729906816

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 748

Divisors of 81012941729906816

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 4 7 8 14 16 28 31 32 56 62 64 89 112 124 128 178 217 224 248 356 434 448 496 619 623 712 868 896 961 992 1238 1246 1424 1736 1922 1984 2476 2492 2759 2848 3472 3844 3968 4333 4952 4984 5518 5696 6727 6944 7688 7921 8666 9904 9968 11036 11392 13454 13888 15376 15842 17332 19189 19313 19808 19936 22072 26908 27776 29791 30752 31684 34664 38378 38626 39616 39872 44144 53816 55091 55447 59582 61504 63368 69328 76756 77252 79232 79744 85529 88288 107632 110182 110894 119164 123008 126736 134323 138656 153512 154504 171058 176576 208537 215264 220364 221788 238328 245551 253472 268646 277312 307024 309008 342116 353152 383161 385637 417074 430528 440728 443576 476656 491102 506944 537292 554624 594859 598703 614048 618016 684232 766322 771274 834148 861056 881456 887152 953312 982204 1013888 1074584 1189718 1197406 1228096 1236032 1368464 1532644 1542548 1668296 1707821 1718857 1762912 1774304 1906624 1964408 2149168 2379436 2394812 2456192 2472064 2651399 2682127 2736928 3065288 3085096 3336592 3415642 3437714 3525824 3548608 3813248 3928816 4164013 4298336 4758872 4789624 4903099 5302798 5364254 5473856 6130576 6170192 6673184 6831284 6875428 7051648 7097216 7612081 7857632 8328026 8596672 9517744 9579248 9806198 10605596 10728508 10947712 11877991 11954747 12261152 12340384 13346368 13662568 13750856 15224162 15715264 16656052 17193344 18440629 18559793 19035488 19158496 19612396 21211192 21457016 23755982 23909494 24522304 24680768 26692736 27325136 27501712 30448324 31430528 33312104 34101329 34321693 36881258 37119586 38070976 38316992 39224792 42422384 42914032 47511964 47818988 49044608 49361536 52942451 53284567 54650272 55003424 60896648 66624208 68202658 68643386 73762516 74239172 76141952 76633984 78449584 83145937 84844768 85828064 95023928 95637976 105884902 106569134 109300544 110006848 121793296 129084403 133248416 136405316 137286772 147525032 148478344 151996069 156899168 166291874 169689536 171656128 190047856 191275952 211769804 213138268 218601088 220013696 235974511 238709303 243586592 258168806 266496832 272810632 274573544 295050064 296956688 303992138 313798336 332583748 339379072 343312256 368217721 370597157 380095712 382551904 423539608 426276536 471949022 477418606 487173184 516337612 532993664 545621264 549147088 590100128 593913376 607984276 627596672 665167496 736435442 741194314 760191424 765103808 847079216 852553072 943898044 954837212 974346368 1032675224 1057141199 1063972483 1091242528 1098294176 1180200256 1187826752 1215968552 1330334992 1472870884 1482388628 1520382848 1530207616 1641215981 1651821577 1694158432 1705106144 1887796088 1909674424 2065350448 2114282398 2127944966 2182485056 2196588352 2360400512 2375653504 2431937104 2577524047 2660669984 2945741768 2964777256 3035018281 3282431962 3303643154 3388316864 3410212288 3775592176 3819348848 4130700896 4228564796 4255889932 4364970112 4393176704 4711878139 4863874208 5155048094 5321339968 5891483536 5929554512 6070036562 6564863924 6607286308 6776633728 6820424576 7399988393 7551184352 7638697696 8261401792 8457129592 8511779864 9423756278 9727748416 10310096188 10642679936 11414749351 11488511867 11782967072 11859109024 12140073124 13129727848 13214572616 14799976786 15102368704 15277395392 16522803584 16914259184 17023559728 18847512556 19455496832 20620192376 21245127967 22829498702 22977023734 23565934144 23718218048 24280146248 26259455696 26429145232 29599953572 30204737408 30554790784 32771377169 32983146973 33828518368 34047119456 37695025112 41240384752 42490255934 45658997404 45954047468 47131868288 47436436096 48560292496 52518911392 52858290464 59199907144 65542754338 65966293946 67657036736 68094238912 75390050224 79903245457 82480769504 84980511868 91317994808 91908094936 94085566711 97120584992 105037822784 105716580928 118399814288 131085508676 131932587892 135314073472 136188477824 146068222309 150780100448 159806490914 164961539008 169961023736 182635989616 183816189872 188171133422 194241169984 210075645568 211433161856 229399640183 236799628576 262171017352 263865175784 292136444618 301560200896 319612981828 329923078016 339922047472 365271979232 367632379744 376342266844 388482339968 458799280366 473599257152 524342034704 527730351568 584272889236 603120401792 639225963656 658598966977 679844094944 730543958464 735264759488 752684533688 917598560732 947198514304 1015912692239 1022477556163 1048684069408 1055460703136 1168545778472 1278451927312 1317197933954 1359688189888 1461087916928 1470529518976 1505369067376 1835197121464 2031825384478 2044955112326 2097368138816 2110921406272 2337091556944 2556903854624 2634395867908 2719376379776 2916652568041 3010738134752 3670394242928 4063650768956 4089910224652 4194736277632 4221842812544 4674183113888 5113807709248 5268791735816 5833305136082 6021476269504 7111388845673 7340788485856 8127301537912 8179820449304 9348366227776 10227615418496 10537583471632 11666610272164 12042952539008 14222777691346 14681576971712 16254603075824 16359640898608 18696732455552 20416567976287 21075166943264 23333220544328 28445555382692 29363153943424 32509206151648 32719281797216 40833135952574 42150333886528 46666441088656 56891110765384 65018412303296 65438563594432 81666271905148 84300667773056 90416229609271 93332882177312 113782221530768 130036824606592 130877127188864 163332543810296 180832459218542 186665764354624 227564443061536 326665087620592 361664918437084 373331528709248 455128886123072 632913607264897 653330175241184 723329836874168 910257772246144 1265827214529794 1306660350482368 1446659673748336 2531654429059588 2613320700964736 2893319347496672 5063308858119176 5786638694993344 10126617716238352 11573277389986688 20253235432476704 40506470864953408 81012941729906816
• Sum of all divisors σ(n): 193074722654261760
• Sum of proper divisors (its aliquot sum) s(n): 112061780924354944
• 81012941729906816 is an abundant number, because the sum of its proper divisors (112061780924354944) is greater than itself. Its abundance is 31048839194448128

Bases of 81012941729906816

• Binary: 100011111110100001101011101011110000001010100000010000000₂
• Hexadecimal: 0x11FD0D75E054080
• Base-36: M5OOVN9TDVK

Squares and roots of 81012941729906816

• 81012941729906816 squared (81012941729906816²) is 6563096727733277172975672043257856
• 81012941729906816 cubed (81012941729906816³) is 531695772771598082990740152247952162469051939946496
• The square root of 81012941729906816 is 284627724.8089279443
• The cube root of 81012941729906816 is 432697.9133272981

Scales and comparisons

• 81,012,941,729,906,816 seconds is equal to 2,575,960,957 years, 27 weeks, 3 days, 14 hours, 6 minutes, 56 seconds.
• To count from 1 to 81,012,941,729,906,816 would take you about seven billion, seven hundred twenty-seven million, eight hundred eighty-two thousand, eight hundred seventy-two 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 81012941729906816 cubic inches would be around 36058.2 feet tall.

Recreational maths with 81012941729906816

• 81012941729906816 backwards is 61860992714921018
• The number of decimal digits it has is: 17
• The sum of 81012941729906816's digits is 74
• More coming soon!