81393538744320

Names of 81393538744320

• Cardinal: 81393538744320 can be written as Eighty-one trillion, three hundred ninety-three billion, five hundred thirty-eight million, seven hundred forty-four thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.139353874432 × 10¹³

Factors of 81393538744320

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 20
• Sum of prime factors: 4019

Divisors of 81393538744320

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 32 33 40 44 48 55 60 64 66 80 88 96 110 120 121 128 132 160 165 176 192 220 240 242 256 264 320 330 352 363 384 440 480 484 512 528 605 640 660 704 726 768 877 880 960 968 1024 1056 1210 1280 1320 1408 1452 1536 1754 1760 1815 1920 1936 2048 2112 2420 2560 2631 2640 2816 2904 3072 3121 3508 3520 3630 3840 3872 4096 4224 4385 4840 5120 5262 5280 5632 5808 6144 6242 7016 7040 7260 7680 7744 8192 8448 8770 9363 9647 9680 10240 10524 10560 11264 11616 12288 12484 13155 14032 14080 14520 15360 15488 15605 16384 16896 17540 18726 19294 19360 20480 21048 21120 22528 23232 24576 24968 26310 28064 28160 28941 29040 30720 30976 31210 33792 34331 35080 37452 38588 38720 40960 42096 42240 45056 46464 46815 48235 49152 49936 52620 56128 56320 57882 58080 61440 61952 62420 67584 68662 70160 74904 77176 77440 81920 84192 84480 90112 92928 93630 96470 99872 102993 105240 106117 112256 112640 115764 116160 122880 123904 124840 135168 137324 140320 144705 149808 154352 154880 168384 168960 171655 180224 185856 187260 192940 199744 205986 210480 212234 224512 225280 231528 232320 245760 247808 249680 270336 274648 280640 289410 299616 308704 309760 318351 336768 337920 343310 371712 374520 377641 385880 399488 411972 420960 424468 449024 450560 463056 464640 495616 499360 514965 530585 540672 549296 561280 578820 599232 617408 619520 636702 673536 675840 686620 743424 749040 755282 771760 798976 823944 841920 848936 898048 901120 926112 929280 991232 998720 1029930 1061170 1098592 1122560 1132923 1157640 1198464 1234816 1239040 1273404 1347072 1351680 1373240 1486848 1498080 1510564 1543520 1591755 1597952 1647888 1683840 1697872 1796096 1852224 1858560 1888205 1982464 1997440 2059860 2122340 2197184 2245120 2265846 2315280 2396928 2469632 2478080 2546808 2694144 2703360 2737117 2746480 2973696 2996160 3021128 3087040 3183510 3195904 3295776 3367680 3395744 3592192 3704448 3717120 3776410 3994880 4119720 4244680 4394368 4490240 4531692 4630560 4793856 4939264 4956160 5093616 5388288 5474234 5492960 5664615 5947392 5992320 6042256 6174080 6367020 6391808 6591552 6735360 6791488 7184384 7408896 7434240 7552820 7989760 8211351 8239440 8489360 8788736 8980480 9063384 9261120 9587712 9878528 9912320 10187232 10776576 10948468 10985920 11329230 11984640 12084512 12348160 12734040 12783616 13183104 13470720 13582976 13685585 14368768 14817792 14868480 15105640 15979520 16422702 16478880 16978720 17577472 17960960 18126768 18522240 19175424 19757056 20374464 21553152 21896936 21971840 22658460 23969280 24169024 24696320 25468080 25567232 26366208 26941440 27165952 27371170 29635584 29736960 30108287 30211280 31959040 32845404 32957760 33957440 35154944 35921920 36253536 37044480 38350848 39514112 40748928 41056755 43106304 43793872 43943680 45316920 47938560 48338048 49392640 50936160 51134464 52732416 53882880 54331904 54742340 59271168 60216574 60422560 63918080 65690808 65915520 67914880 70309888 71843840 72507072 74088960 76701696 79028224 81497856 82113510 87587744 87887360 90324861 90633840 95877120 96676096 98785280 101872320 105464832 107765760 108663808 109484680 118542336 120433148 120845120 127836160 131381616 131831040 135829760 140619776 145014144 148177920 150541435 153403392 158056448 162995712 164227020 175175488 175774720 180649722 181267680 191754240 193352192 197570560 203744640 210929664 215531520 217327616 218969360 237084672 240866296 241690240 255672320 262763232 263662080 271659520 281239552 290028288 296355840 301082870 325991424 328454040 331191157 350350976 351549440 361299444 362535360 383508480 386704384 395141120 407489280 421859328 434655232 437938720 451624305 474169344 481732592 483380480 525526464 527324160 543319040 562479104 580056576 592711680 602165740 651982848 656908080 662382314 700701952 703098880 722598888 725070720 767016960 773408768 790282240 814978560 843718656 869310464 875877440 903248610 963465184 966760960 993573471 1051052928 1054648320 1086638080 1160113152 1185423360 1204331480 1303965696 1313816160 1324764628 1401403904 1406197760 1445197776 1450141440 1546817536 1629957120 1655955785 1687437312 1738620928 1751754880 1806497220 1926930368 1933521920 1987146942 2102105856 2109296640 2173276160 2320226304 2370846720 2408662960 2607931392 2627632320 2649529256 2802807808 2812395520 2890395552 2900282880 3093635072 3259914240 3311911570 3503509760 3612994440 3853860736 3867043840 3974293884 4204211712 4218593280 4346552320 4640452608 4817325920 4967867355 5215862784 5255264640 5299058512 5605615616 5780791104 5800565760 6187270144 6519828480 6623823140 7007019520 7225988880 7707721472 7734087680 7948587768 8408423424 8437186560 8693104640 9280905216 9634651840 9935734710 10510529280 10598117024 11211231232 11561582208 11601131520 13039656960 13247646280 14014039040 14451977760 15415442944 15468175360 15897175536 16816846848 18561810432 19269303680 19871469420 21021058560 21196234048 22422462464 23123164416 23202263040 26079313920 26495292560 28028078080 28903955520 30830885888 30936350720 31794351072 33633693696 38538607360 39742938840 42042117120 42392468096 44844924928 46246328832 46404526080 52990585120 56056156160 57807911040 61661771776 63588702144 67267387392 77077214720 79485877680 84084234240 84784936192 92492657664 92809052160 105981170240 112112312320 115615822080 123323543552 127177404288 134534774784 154154429440 158971755360 168168468480 169569872384 184985315328 211962340480 224224624640 231231644160 246647087104 254354808576 308308858880 317943510720 336336936960 339139744768 369970630656 423924680960 462463288320 493294174208 508709617152 616617717760 635887021440 672673873920 678279489536 739941261312 847849361920 924926576640 1017419234304 1233235435520 1271774042880 1356558979072 1479882522624 1695698723840 1849853153280 2034838468608 2466470871040 2543548085760 2713117958144 3391397447680 3699706306560 4069676937216 5087096171520 5426235916288 6782794895360 7399412613120 8139353874432 10174192343040 13565589790720 16278707748864 20348384686080 27131179581440 40696769372160 81393538744320
• Sum of all divisors σ(n): 286699528326624
• Sum of proper divisors (its aliquot sum) s(n): 205305989582304
• 81393538744320 is an abundant number, because the sum of its proper divisors (205305989582304) is greater than itself. Its abundance is 123912450837984

Bases of 81393538744320

• Binary: 10010100000011011101000111101101100000000000000₂
• Hexadecimal: 0x4A06E8F6C000
• Base-36: SUNOBG6IO

Squares and roots of 81393538744320

• 81393538744320 squared (81393538744320²) is 6624908149323120962332262400
• 81393538744320 cubed (81393538744320³) is 539224718129492754030372962963520749568000
• The square root of 81393538744320 is 9021836.7722055357
• The cube root of 81393538744320 is 43337.4456721629

Scales and comparisons

• 81,393,538,744,320 seconds is equal to 2,588,062 years, 39 weeks, 5 days, 13 hours, 52 minutes.
• To count from 1 to 81,393,538,744,320 would take you about six million, four hundred seventy thousand, one hundred fifty-six 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 81393538744320 cubic inches would be around 3611.5 feet tall.

Recreational maths with 81393538744320

• 81393538744320 backwards is 02344783539318
• 81393538744320 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81393538744320's digits is 60
• More coming soon!