81723331872

Names of 81723331872

• Cardinal: 81723331872 can be written as Eighty-one billion, seven hundred twenty-three million, three hundred thirty-one thousand, eight hundred seventy-two.

Scientific notation

• Scientific notation: 8.1723331872 × 10¹⁰

Factors of 81723331872

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 231

Divisors of 81723331872

• Number of divisors d(n): 1152
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 16 17 18 21 24 26 28 31 32 34 36 39 42 48 51 52 56 61 62 63 68 72 78 84 91 93 96 97 102 104 112 117 119 122 124 126 136 144 153 156 168 182 183 186 194 204 208 217 221 224 234 238 244 248 252 272 273 279 288 291 306 312 336 357 364 366 372 388 403 408 416 427 434 442 468 476 488 496 504 527 544 546 549 558 582 612 624 651 663 672 679 714 728 732 744 776 793 806 816 819 854 868 873 884 936 952 976 992 1008 1037 1054 1071 1092 1098 1116 1164 1209 1224 1248 1261 1281 1302 1326 1358 1428 1456 1464 1488 1547 1552 1581 1586 1612 1632 1638 1649 1708 1736 1746 1768 1872 1891 1904 1952 1953 1989 2016 2037 2074 2108 2142 2184 2196 2232 2328 2379 2418 2448 2522 2562 2604 2652 2716 2821 2856 2912 2928 2976 3007 3094 3104 3111 3162 3172 3224 3276 3298 3416 3472 3492 3536 3627 3689 3744 3782 3783 3808 3843 3906 3978 4074 4148 4216 4284 4368 4392 4464 4641 4656 4743 4758 4836 4896 4947 5044 5124 5208 5304 5432 5551 5642 5673 5712 5856 5917 6014 6111 6188 6222 6324 6344 6448 6552 6596 6832 6851 6944 6984 7072 7137 7254 7259 7378 7564 7566 7686 7812 7956 8148 8296 8432 8463 8568 8736 8784 8827 8928 9021 9282 9312 9333 9486 9516 9672 9894 10088 10248 10416 10608 10864 11067 11102 11284 11346 11349 11424 11543 11834 12028 12222 12376 12444 12648 12688 12896 13104 13192 13237 13481 13664 13702 13923 13968 14274 14508 14518 14756 14841 15128 15132 15372 15624 15912 16296 16592 16653 16864 16926 17019 17136 17568 17654 17751 18042 18564 18666 18972 19032 19344 19788 20176 20496 20553 20832 21049 21216 21437 21728 21777 22134 22204 22568 22692 22698 23086 23668 24056 24444 24583 24752 24888 25296 25376 25389 26208 26384 26474 26481 26962 27063 27404 27846 27936 28548 29016 29036 29512 29682 30256 30264 30744 31248 31824 32147 32592 33184 33201 33306 33852 34038 34272 34629 35308 35502 36084 37128 37332 37944 38064 38688 39091 39576 39711 40352 40443 40992 41106 41419 42098 42874 43554 44268 44408 45136 45384 45396 46172 47336 47957 48112 48888 49166 49504 49776 49959 50592 50778 51119 52768 52948 52962 53253 53924 54126 54808 55692 57096 58032 58072 59024 59364 60512 60528 61488 61659 62496 63147 63648 64294 64311 65184 65331 66402 66612 67704 68076 69258 70616 71004 72168 73749 74256 74664 75888 76128 76921 78182 79152 79422 79443 80886 82212 82838 84196 85748 87108 88536 88816 90272 90768 90792 92344 94367 94672 95914 96224 96441 97776 98332 99552 99918 100589 101556 102238 103887 105896 105924 106506 107848 108252 109616 111384 114192 116064 116144 117273 118048 118728 119133 121056 121329 122976 123318 124257 126294 128588 128622 130662 132804 133224 135408 136152 138516 141232 142008 143871 144336 147498 148512 149328 150059 151776 153357 153842 156364 158304 158844 158886 161772 164424 165676 168392 171496 172081 174216 177072 177632 181536 181584 183427 184688 188734 189344 189441 191828 192882 192933 195552 196664 199836 201178 203112 204476 207774 211792 211848 213012 215696 216504 219232 221247 222768 225029 228384 230763 232288 234546 237456 238266 242658 246636 248514 252588 257176 257244 261324 265608 266448 270816 272304 273637 277032 282464 283101 284016 287742 288672 289323 294996 298656 300118 301767 306714 307684 312728 317688 317772 323544 328848 331352 336784 342992 344162 348432 351819 354144 357833 363168 366854 369376 372771 377468 378882 383656 385764 385866 393328 399672 402356 406224 408952 415548 417911 423584 423696 426024 431392 431613 433008 442494 445536 450058 450177 460071 461526 469092 474912 476532 485316 493272 497028 505176 514352 514488 516243 522648 531216 532896 538447 544608 547274 550281 554064 566202 568032 575484 578646 589992 600236 603534 613428 615368 625456 635376 635544 647088 657696 662704 664547 673568 675087 685984 688324 692289 696864 703638 704123 715666 733708 745542 754936 757764 767312 771528 771732 786656 799344 804712 812448 817904 820911 831096 835822 847392 849303 852048 863226 866016 884988 900116 900354 905301 920142 923052 938184 953064 970632 986544 994056 1010352 1028704 1028976 1032486 1045296 1062432 1073499 1076894 1094548 1100562 1108128 1132404 1150968 1157292 1179984 1200472 1207068 1226856 1230736 1250912 1253733 1270752 1271088 1283989 1294176 1307657 1325408 1329094 1350174 1350531 1376648 1384578 1407276 1408246 1431332 1467416 1491084 1509872 1515528 1534624 1543056 1543464 1548729 1598688 1609424 1615341 1635808 1641822 1650843 1662192 1671644 1698606 1704096 1726452 1769976 1800232 1800708 1810602 1840284 1846104 1876368 1906128 1941264 1973088 1988112 1993641 2020704 2025261 2057952 2064972 2090592 2112369 2146998 2153788 2189096 2201124 2264808 2301936 2314584 2359968 2384551 2400944 2414136 2453712 2461472 2462733 2507466 2542176 2567978 2615314 2658188 2700348 2701062 2753296 2769156 2814552 2816492 2862664 2925377 2934832 2982168 3019744 3031056 3086112 3086928 3097458 3118259 3218848 3220497 3230682 3283644 3301686 3324384 3343288 3397212 3452904 3539952 3600464 3601416 3621204 3680568 3692208 3752736 3761199 3812256 3851967 3882528 3922971 3976224 3987282 4050522 4129944 4224738 4293996 4307576 4378192 4402248 4529616 4603872 4629168 4651829 4769102 4801888 4828272 4846023 4907424 4925466 5014932 5135956 5230628 5316376 5400696 5402124 5506592 5538312 5629104 5632984 5725328 5850754 5869664 5964336 5980923 6062112 6173856 6194916 6236518 6337107 6440994 6461364 6567288 6603372 6686576 6794424 6905808 7079904 7153653 7200928 7202832 7242408 7361136 7384416 7522398 7703934 7845942 7974564 8101044 8259888 8449476 8587992 8615152 8756384 8776131 8804496 9059232 9153599 9258336 9303658 9354777 9538204 9656544 9692046 9850932 10029864 10271912 10461256 10632752 10801392 10804248 11076624 11258208 11265968 11450656 11555901 11701508 11768913 11928672 11961846 12389832 12473036 12674214 12881988 12922728 13134576 13206744 13373152 13588848 13811616 13955487 14307306 14405664 14484816 14722272 15044796 15407868 15691884 15949128 16202088 16519776 16691857 16898952 17175984 17230304 17552262 17608992 18307198 18607316 18709554 19076408 19384092 19701864 20059728 20543824 20922512 21265504 21460959 21602784 21608496 21827813 22153248 22531936 23111802 23403016 23537826 23923692 24779664 24946072 25348428 25763976 25845456 26269152 26328393 26413488 27177696 27460797 27910974 28064331 28614612 28969632 30089592 30815736 31383768 31898256 32404176 33383714 33797904 34351968 35104524 36614396 37214632 37419108 38152816 38768184 39403728 40119456 40537367 41087648 41845024 41866461 42921918 43216992 43655626 46223604 46806032 47075652 47847384 49559328 49892144 50075571 50696856 51527952 51690912 52656786 52826976 54921594 55821948 56128662 57229224 60179184 61631472 62767536 63796512 64808352 65483439 66767428 67595808 70209048 73228792 74429264 74838216 76305632 77536368 78807456 81074734 82382391 83732922 85843836 87311252 92447208 93612064 94151304 95694768 99784288 100151142 101393712 103055904 105313572 109843188 111643896 112257324 114458448 120358368 121612101 123262944 125535072 130966878 133534856 140418096 146457584 148858528 149676432 150226713 155072736 162149468 164764782 167465844 171687672 174622504 184894416 188302608 191389536 196450317 200302284 202787424 210627144 219686376 223287792 224514648 228916896 243224202 261933756 267069712 280836192 283761569 292915168 299352864 300453426 324298936 329529564 334931688 343375344 349245008 364836303 369788832 376605216 392900634 400604568 421254288 439372752 446575584 449029296 486448404 523867512 534139424 567523138 600906852 648597872 659059128 669863376 686750688 698490016 729672606 785801268 801209136 842508576 851284707 878745504 898058592 972896808 1047735024 1135046276 1201813704 1297195744 1318118256 1339726752 1459345212 1571602536 1602418272 1702569414 1945793616 2095470048 2270092552 2403627408 2553854121 2636236512 2918690424 3143205072 3405138828 3891587232 4540185104 4807254816 5107708242 5837380848 6286410144 6810277656 9080370208 10215416484 11674761696 13620555312 20430832968 27241110624 40861665936 81723331872
• Sum of all divisors σ(n): 321027452928
• Sum of proper divisors (its aliquot sum) s(n): 239304121056
• 81723331872 is an abundant number, because the sum of its proper divisors (239304121056) is greater than itself. Its abundance is 157580789184

Bases of 81723331872

• Binary: 1001100000111000101110001010100100000₂
• Hexadecimal: 0x1307171520
• Base-36: 11JJYMG0

Squares and roots of 81723331872

• 81723331872 squared (81723331872²) is 6678702972261051024384
• 81723331872 cubed (81723331872³) is 545805859476602683085259196366848
• The square root of 81723331872 is 285872.9295893545
• The cube root of 81723331872 is 4339.5898844417

Scales and comparisons

• 81,723,331,872 seconds is equal to 2,598 years, 28 weeks, 3 days, 21 hours, 31 minutes, 12 seconds.
• To count from 1 to 81,723,331,872 would take you about five thousand, one hundred ninety-seven 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 81723331872 cubic inches would be around 361.6 feet tall.

Recreational maths with 81723331872

• 81723331872 backwards is 27813332718
• The number of decimal digits it has is: 11
• The sum of 81723331872's digits is 45
• More coming soon!