81720272126880

Names of 81720272126880

• Cardinal: 81720272126880 can be written as Eighty-one trillion, seven hundred twenty billion, two hundred seventy-two million, one hundred twenty-six thousand, eight hundred eighty.

Scientific notation

• Scientific notation: 8.172027212688 × 10¹³

Factors of 81720272126880

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 1884

Divisors of 81720272126880

• Number of divisors d(n): 672
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 73 80 81 90 96 108 120 135 144 146 160 162 180 216 219 240 243 270 288 292 324 360 365 405 432 438 480 486 540 584 648 657 720 729 730 810 864 876 972 1080 1095 1168 1215 1296 1314 1440 1458 1460 1620 1752 1801 1944 1971 2160 2190 2336 2430 2592 2628 2916 2920 3240 3285 3504 3602 3645 3888 3942 4320 4380 4860 5256 5329 5403 5832 5840 5913 6480 6570 7008 7204 7290 7776 7884 8760 9005 9720 9855 10512 10658 10806 11664 11680 11826 12960 13140 14408 14580 15768 15987 16209 17520 17739 18010 19440 19710 21024 21316 21612 23328 23652 26280 26645 27015 28816 29160 29565 31536 31974 32418 35040 35478 36020 38880 39420 42632 43224 47304 47961 48627 52560 53217 53290 54030 57632 58320 59130 63072 63948 64836 70956 72040 78840 79935 81045 85264 86448 88695 94608 95922 97254 105120 106434 106580 108060 116640 118260 127896 129672 131473 141912 143883 144080 145881 157680 159870 162090 170528 172896 177390 189216 191844 194508 212868 213160 216120 236520 239805 243135 255792 259344 262946 266085 283824 287766 288160 291762 315360 319740 324180 354780 383688 389016 389017 394419 425736 426320 431649 432240 437643 473040 479610 486270 511584 518688 525892 532170 567648 575532 583524 639480 648360 657365 709560 719415 729405 767376 778032 778034 788838 851472 852640 863298 864480 875286 946080 959220 972540 1051784 1064340 1151064 1167048 1167051 1183257 1278960 1294947 1296720 1312929 1314730 1419120 1438830 1458810 1534752 1556064 1556068 1577676 1702944 1726596 1750572 1918440 1945080 1945085 1972095 2103568 2128680 2158245 2188215 2302128 2334096 2334102 2366514 2557920 2589894 2593440 2625858 2629460 2838240 2877660 2917620 3112136 3155352 3453192 3501144 3501153 3549771 3836880 3884841 3890160 3890170 3944190 4207136 4257360 4316490 4376430 4604256 4668192 4668204 4733028 5179788 5251716 5258920 5755320 5835240 5835255 5916285 6224272 6310704 6474735 6564645 6906384 7002288 7002306 7099542 7673760 7769682 7780320 7780340 7888380 8514720 8632980 8752860 9336408 9466056 9597529 10359576 10503432 10503459 10517840 10649313 11510640 11670480 11670510 11832570 12448544 12621408 12949470 13129290 13812768 14004576 14004612 14199084 15539364 15560680 15776760 17265960 17505720 17505765 17748855 18672816 18932112 19195058 19424205 20719152 21006864 21006918 21035680 21298626 23021280 23340960 23341020 23665140 25898940 26258580 28009224 28398168 28792587 31078728 31121360 31510377 31553520 31947939 34531920 35011440 35011530 35497710 37345632 37864224 38390116 38848410 41438304 42013728 42013836 42597252 46682040 47330280 47987645 51797880 52517160 52517295 53246565 56018448 56796336 57585174 62157456 62242720 63020754 63107040 63895878 69063840 70022880 70023060 70995420 76780232 77696820 84027672 85194504 86377761 93364080 94531131 94660560 95843817 95975290 103595760 105034320 105034590 106493130 112036896 113592672 115170348 124314912 126041508 127791756 140046120 141990840 143962935 153560464 155393640 157551885 159739695 168055344 170389008 172755522 186728160 189062262 189321120 191687634 191950580 207191520 210068640 210069180 212986260 230340696 252083016 255583512 259133283 280092240 283593393 283981680 287925870 307120928 310787280 315103770 319479390 336110688 340778016 345511044 378124524 383375268 383901160 420138360 425972520 431888805 460681392 472655655 479219085 504166032 511167024 518266566 560184480 567186786 567963360 575851740 621574560 630207540 638958780 691022088 700619617 756249048 766750536 767802320 777399849 840276720 851945040 863777610 921362784 945311310 958438170 1008332064 1022334048 1036533132 1134373572 1151703480 1260415080 1277917560 1295666415 1382044176 1401239234 1417966965 1512498096 1533501072 1535604640 1554799698 1680553440 1703890080 1727555220 1890622620 1916876340 2073066264 2101858851 2268747144 2303406960 2332199547 2520830160 2555835120 2591332830 2764088352 2802478468 2835933930 3024996192 3067002144 3109599396 3455110440 3503098085 3781245240 3833752680 3886999245 4146132528 4203717702 4537494288 4606813920 4664399094 5041660320 5111670240 5182665660 5604956936 5671867860 6219198792 6305576553 6910220880 6996598641 7006196170 7562490480 7667505360 7773998490 8292265056 8407435404 9074988576 9328798188 10365331320 10509294255 11209913872 11343735720 11660997735 12438397584 12611153106 13820441760 13993197282 14012392340 15124980960 15335010720 15547996980 16814870808 18657596376 18916729659 20730662640 21018588510 22419827744 22687471440 23321995470 24876795168 25222306212 27986394564 28024784680 31095993960 31527882765 33629741616 34982993205 37315192752 37833459318 41461325280 42037177020 45374942880 46643990940 50444612424 55972789128 56049569360 56750188977 62191987920 63055765530 67259483232 69965986410 74630385504 75666918636 84074354040 93287981880 94583648295 100889224848 111945578256 112099138720 113500377954 124383975840 126111531060 139931972820 151333837272 168148708080 170250566931 186575963760 189167296590 201778449696 223891156512 227000755908 252223062120 279863945640 283750944885 302667674544 336297416160 340501133862 373151927520 378334593180 454001511816 504446124240 510751700793 559727891280 567501889770 605335349088 681002267724 756669186360 851252834655 908003023632 1008892248480 1021503401586 1119455782560 1135003779540 1362004535448 1513338372720 1702505669310 1816006047264 2043006803172 2270007559080 2553758503965 2724009070896 3026676745440 3405011338620 4086013606344 4540015118160 5107517007930 5448018141792 6810022677240 8172027212688 9080030236320 10215034015860 13620045354480 16344054425376 20430068031720 27240090708960 40860136063440 81720272126880
• Sum of all divisors σ(n): 293647073625360
• Sum of proper divisors (its aliquot sum) s(n): 211926801498480
• 81720272126880 is an abundant number, because the sum of its proper divisors (211926801498480) is greater than itself. Its abundance is 130206529371600

Bases of 81720272126880

• Binary: 10010100101001011111011110010101000001110100000₂
• Hexadecimal: 0x4A52FBCA83A0
• Base-36: SYTRW2I00

Squares and roots of 81720272126880

• 81720272126880 squared (81720272126880²) is 6678202876491320238818534400
• 81720272126880 cubed (81720272126880³) is 545744556385383476524574301710652444672000
• The square root of 81720272126880 is 9039926.5553919187
• The cube root of 81720272126880 is 43395.3572526679

Scales and comparisons

• 81,720,272,126,880 seconds is equal to 2,598,451 years, 45 weeks, 3 days, 22 hours, 48 minutes.
• To count from 1 to 81,720,272,126,880 would take you about six million, four hundred ninety-six thousand, one 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 81720272126880 cubic inches would be around 3616.3 feet tall.

Recreational maths with 81720272126880

• 81720272126880 backwards is 08862127202718
• 81720272126880 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81720272126880's digits is 54
• More coming soon!