81323857440

Names of 81323857440

• Cardinal: 81323857440 can be written as Eighty-one billion, three hundred twenty-three million, eight hundred fifty-seven thousand, four hundred forty.

Scientific notation

• Scientific notation: 8.132385744 × 10¹⁰

Factors of 81323857440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 65

Divisors of 81323857440

• Number of divisors d(n): 1440
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 17 18 20 21 24 27 28 30 31 32 34 35 36 40 42 45 48 49 51 54 56 60 62 63 68 70 72 80 81 84 85 90 93 96 98 102 105 108 112 119 120 124 126 135 136 140 144 147 153 155 160 162 168 170 180 186 189 196 204 210 216 217 224 238 240 243 245 248 252 255 270 272 279 280 288 294 306 310 315 324 336 340 357 360 372 378 392 405 408 420 432 434 441 459 465 476 480 486 490 496 504 510 527 540 544 558 560 567 588 595 612 620 630 648 651 672 680 714 720 729 735 744 756 765 784 810 816 833 837 840 864 868 882 918 930 945 952 972 980 992 1008 1020 1054 1071 1080 1085 1116 1120 1134 1176 1190 1215 1224 1240 1260 1296 1302 1323 1360 1377 1395 1428 1440 1458 1470 1488 1512 1519 1530 1568 1581 1620 1632 1666 1674 1680 1701 1736 1764 1785 1836 1860 1890 1904 1944 1953 1960 2016 2040 2108 2142 2160 2170 2187 2205 2232 2268 2295 2352 2380 2430 2448 2480 2499 2511 2520 2592 2604 2635 2646 2720 2754 2790 2835 2856 2916 2940 2976 3024 3038 3060 3162 3213 3240 3255 3332 3348 3360 3402 3472 3528 3570 3645 3672 3689 3720 3780 3808 3888 3906 3920 3969 4080 4131 4165 4185 4216 4284 4320 4340 4374 4410 4464 4536 4557 4590 4704 4743 4760 4860 4896 4960 4998 5022 5040 5103 5208 5270 5292 5355 5508 5580 5670 5712 5832 5859 5880 6048 6076 6120 6324 6426 6480 6510 6561 6615 6664 6696 6804 6885 6944 7056 7140 7290 7344 7378 7440 7497 7533 7560 7595 7776 7812 7840 7905 7938 8160 8262 8330 8370 8432 8505 8568 8680 8748 8820 8928 9072 9114 9180 9486 9520 9639 9720 9765 9996 10044 10080 10206 10416 10540 10584 10710 10935 11016 11067 11160 11340 11424 11664 11718 11760 11907 12152 12240 12393 12495 12555 12648 12852 12960 13020 13122 13230 13328 13392 13608 13671 13770 14112 14229 14280 14580 14688 14756 14880 14994 15066 15120 15190 15309 15624 15810 15876 16065 16524 16660 16740 16864 17010 17136 17360 17496 17577 17640 18144 18228 18360 18445 18972 19040 19278 19440 19530 19683 19845 19992 20088 20412 20655 20832 21080 21168 21420 21870 22032 22134 22320 22491 22599 22680 22785 23328 23436 23520 23715 23814 24304 24480 24786 24990 25110 25296 25515 25704 25823 26040 26244 26460 26656 26784 27216 27342 27540 28458 28560 28917 29160 29295 29512 29988 30132 30240 30380 30618 31248 31620 31752 32130 32805 33048 33201 33320 33480 34020 34272 34720 34992 35154 35280 35721 36456 36720 36890 37179 37485 37665 37944 38556 38880 39060 39366 39690 39984 40176 40824 41013 41310 42160 42336 42687 42840 43740 44064 44268 44640 44982 45198 45360 45570 45927 46872 47430 47628 48195 48608 49572 49980 50220 50592 51030 51408 51646 52080 52488 52731 52920 54432 54684 55080 55335 56916 57120 57834 58320 58590 59024 59535 59976 60264 60760 61236 61965 62496 63240 63504 64260 65610 66096 66402 66640 66960 67473 67797 68040 68355 69984 70308 70560 71145 71442 72912 73440 73780 74358 74970 75330 75888 76545 77112 77469 78120 78732 79380 79968 80352 81648 82026 82620 84320 85374 85680 86751 87480 87885 88536 89964 90396 90720 91140 91854 93744 94860 95256 96390 98415 99144 99603 99960 100440 102060 102816 103292 104160 104976 105462 105840 107163 109368 110160 110670 111537 112455 112995 113832 115668 116640 117180 118048 119070 119952 120528 121520 122472 123039 123930 126480 127008 128061 128520 129115 131220 132192 132804 133280 133920 134946 135594 136080 136710 137781 140616 142290 142884 144585 145824 147560 148716 149940 150660 151776 153090 154224 154938 156240 157464 158193 158760 163296 164052 165240 166005 170748 171360 173502 174960 175770 177072 178605 179928 180792 182280 183708 185895 187488 189720 190512 192780 196830 198288 199206 199920 200880 202419 203391 204120 205065 206584 209952 210924 211680 213435 214326 218736 220320 221340 223074 224910 225990 227664 229635 231336 232407 234360 238140 239904 241056 243040 244944 246078 247860 252960 256122 257040 258230 260253 262440 263655 265608 269892 271188 272160 273420 275562 281232 284580 285768 289170 295120 297432 298809 299880 301320 306180 308448 309876 312480 314928 316386 317520 321489 328104 330480 332010 334611 337365 338985 341496 347004 349920 351540 354144 357210 359856 361584 364560 367416 369117 371790 379440 381024 384183 385560 387345 393660 396576 398412 399840 401760 404838 406782 408240 410130 413168 421848 426870 428652 433755 437472 442680 446148 449820 451980 455328 459270 462672 464814 468720 474579 476280 489888 492156 495720 498015 512244 514080 516460 520506 524880 527310 531216 535815 539784 542376 546840 551124 557685 562464 569160 571536 578340 590240 594864 597618 599760 602640 607257 610173 612360 615195 619752 629856 632772 635040 640305 642978 656208 660960 664020 669222 674730 677970 682992 688905 694008 697221 703080 714420 719712 723168 729120 734832 738234 743580 758880 768366 771120 774690 780759 787320 790965 796824 809676 813564 816480 820260 826336 843696 853740 857304 867510 885360 892296 896427 899640 903960 918540 925344 929628 937440 949158 952560 964467 984312 991440 996030 1012095 1016955 1024488 1032920 1041012 1049760 1054620 1062432 1071630 1079568 1084752 1093680 1102248 1107351 1115370 1138320 1143072 1152549 1156680 1162035 1189728 1195236 1199520 1205280 1214514 1220346 1224720 1230390 1239504 1265544 1280610 1285956 1301265 1312416 1328040 1338444 1349460 1355940 1365984 1377810 1388016 1394442 1406160 1423737 1428840 1469664 1476468 1487160 1494045 1536732 1542240 1549380 1561518 1574640 1581930 1593648 1607445 1619352 1627128 1640520 1673055 1687392 1707480 1714608 1735020 1770720 1784592 1792854 1799280 1807920 1821771 1837080 1845585 1859256 1898316 1905120 1920915 1928934 1968624 1982880 1992060 2024190 2033910 2048976 2065840 2082024 2091663 2109240 2143260 2159136 2169504 2187360 2204496 2214702 2230740 2276640 2305098 2313360 2324070 2342277 2372895 2390472 2429028 2440692 2449440 2460780 2479008 2531088 2561220 2571912 2602530 2656080 2676888 2689281 2698920 2711880 2755620 2776032 2788884 2812320 2847474 2857680 2952936 2974320 2988090 3036285 3050865 3073464 3098760 3123036 3149280 3163860 3187296 3214890 3238704 3254256 3281040 3322053 3346110 3414960 3429216 3457647 3470040 3486105 3569184 3585708 3598560 3615840 3643542 3674160 3691170 3718512 3796632 3841830 3857868 3903795 3937248 3984120 4048380 4067820 4097952 4131680 4164048 4183326 4218480 4271211 4286520 4408992 4429404 4461480 4482135 4610196 4626720 4648140 4684554 4745790 4780944 4822335 4858056 4881384 4921560 5062176 5122440 5143824 5205060 5312160 5353776 5378562 5397840 5423760 5465313 5511240 5536755 5577768 5694948 5715360 5762745 5905872 5948640 5976180 6072570 6101730 6146928 6197520 6246072 6274989 6327720 6429780 6477408 6508512 6562080 6644106 6692220 6829920 6915294 6940080 6972210 7118685 7171416 7287084 7348320 7382340 7437024 7593264 7683660 7715736 7807590 7968240 8067843 8096760 8135640 8328096 8366652 8436960 8542422 8573040 8858808 8922960 8964270 9108855 9220392 9296280 9369108 9491580 9561888 9644670 9716112 9762768 9843120 9966159 10244880 10287648 10372941 10410120 10458315 10707552 10757124 10795680 10847520 10930626 11022480 11073510 11155536 11389896 11525490 11711385 11811744 11952360 12145140 12203460 12293856 12395040 12492144 12549978 12655440 12859560 13288212 13384440 13446405 13830588 13880160 13944420 14237370 14342832 14574168 14764680 15186528 15367320 15431472 15615180 15936480 16135686 16193520 16271280 16395939 16610265 16733304 17084844 17146080 17288235 17717616 17845920 17928540 18217710 18440784 18592560 18738216 18824967 18983160 19289340 19432224 19525536 19686240 19932318 20489760 20745882 20820240 20916630 21356055 21514248 21861252 22044960 22147020 22311072 22779792 23050980 23422770 23904720 24203529 24290280 24406920 24984288 25099956 25310880 25719120 26576424 26768880 26892810 27326565 27661176 27888840 28474740 28685664 29148336 29529360 29898477 30734640 30862944 31230360 31374945 32271372 32387040 32542560 32791878 33220530 33466608 34169688 34576470 35435232 35857080 36435420 36881568 37185120 37476432 37649934 37966320 38578680 39864636 40339215 41491764 41640480 41833260 42712110 43028496 43722504 44294040 45559584 46101960 46845540 47809440 48407058 48580560 48813840 49830795 50199912 51438240 51864705 53152848 53537760 53785620 54653130 55322352 55777680 56474901 56949480 58296672 59058720 59796954 61469280 62460720 62749890 64542744 65583756 66441060 66933216 68339376 69152940 71714160 72610587 72870840 74952864 75299868 75932640 77157360 79729272 80678430 81979695 82983528 83666520 85424220 86056992 87445008 88588080 92203920 93691080 94124835 96814116 97161120 97627680 99661590 100399824 103729410 106305696 107571240 109306260 110644704 111555360 112949802 113898960 119593908 121017645 124921440 125499780 129085488 131167512 132882120 136678752 138305880 143428320 145221174 145741680 149492385 150599736 154314720 159458544 161356860 163959390 165967056 167333040 169424703 170848440 174890016 177176160 184407840 187382160 188249670 193628232 199323180 200799648 207458820 215142480 218612520 225899604 227797920 239187816 242035290 250999560 258170976 262335024 265764240 276611760 282374505 290442348 291483360 298984770 301199472 318917088 322713720 327918780 331934112 334666080 338849406 341696880 363052935 374764320 376499340 387256464 398646360 414917640 430284960 437225040 451799208 478375632 484070580 501999120 508274109 524670048 531528480 553223520 564749010 580884696 597969540 602398944 645427440 655837560 677698812 683393760 726105870 752998680 774512928 797292720 829835280 847123515 874450080 903598416 956751264 968141160 1003998240 1016548218 1129498020 1161769392 1195939080 1290854880 1311675120 1355397624 1452211740 1505997360 1594585440 1659670560 1694247030 1807196832 1936282320 2033096436 2258996040 2323538784 2391878160 2541370545 2623350240 2710795248 2904423480 3011994720 3388494060 3872564640 4066192872 4517992080 4783756320 5082741090 5421590496 5808846960 6776988120 8132385744 9035984160 10165482180 11617693920 13553976240 16264771488 20330964360 27107952480 40661928720 81323857440
• Sum of all divisors σ(n): 366407483904
• Sum of proper divisors (its aliquot sum) s(n): 285083626464
• 81323857440 is an abundant number, because the sum of its proper divisors (285083626464) is greater than itself. Its abundance is 203759769024

Bases of 81323857440

• Binary: 1001011101111010001111001011000100000₂
• Hexadecimal: 0x12EF479620
• Base-36: 11CY4I00

Squares and roots of 81323857440

• 81323857440 squared (81323857440²) is 6613569788921443353600
• 81323857440 cubed (81323857440³) is 537841006683738350647201910784000
• The square root of 81323857440 is 285173.3813664943
• The cube root of 81323857440 is 4332.5075026395

Scales and comparisons

• 81,323,857,440 seconds is equal to 2,585 years, 44 weeks, 8 hours, 24 minutes.
• To count from 1 to 81,323,857,440 would take you about five thousand, one hundred seventy-one 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 81323857440 cubic inches would be around 361 feet tall.

Recreational maths with 81323857440

• 81323857440 backwards is 04475832318
• 81323857440 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81323857440's digits is 45
• More coming soon!