81027152640

Names of 81027152640

• Cardinal: 81027152640 can be written as Eighty-one billion, twenty-seven million, one hundred fifty-two thousand, six hundred forty.

Scientific notation

• Scientific notation: 8.102715264 × 10¹⁰

Factors of 81027152640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 119

Divisors of 81027152640

• Number of divisors d(n): 972
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 23 24 28 30 32 35 36 40 42 45 46 48 49 56 60 63 64 69 70 72 79 80 84 90 92 96 98 105 112 115 120 126 128 138 140 144 147 158 160 161 168 180 184 192 196 207 210 224 230 237 240 245 252 256 276 280 288 294 315 316 320 322 336 345 360 368 384 392 395 414 420 441 448 460 474 480 483 490 504 552 553 560 576 588 630 632 640 644 672 690 711 720 735 736 768 784 790 805 828 840 882 896 920 948 960 966 980 1008 1035 1104 1106 1120 1127 1152 1176 1185 1260 1264 1280 1288 1344 1380 1422 1440 1449 1470 1472 1568 1580 1610 1656 1659 1680 1764 1792 1817 1840 1896 1920 1932 1960 2016 2070 2205 2208 2212 2240 2254 2304 2352 2370 2415 2520 2528 2576 2688 2760 2765 2844 2880 2898 2940 2944 3136 3160 3220 3312 3318 3360 3381 3528 3555 3634 3680 3792 3840 3864 3871 3920 4032 4140 4410 4416 4424 4480 4508 4704 4740 4830 4977 5040 5056 5152 5376 5451 5520 5530 5635 5688 5760 5796 5880 5888 6241 6272 6320 6440 6624 6636 6720 6762 7056 7110 7245 7268 7360 7584 7728 7742 7840 8064 8280 8295 8820 8832 8848 8960 9016 9085 9408 9480 9660 9954 10080 10112 10143 10304 10902 11040 11060 11270 11376 11520 11592 11613 11760 12482 12544 12640 12719 12880 13248 13272 13440 13524 14112 14220 14490 14536 14720 15168 15456 15484 15680 16128 16353 16560 16590 16905 17640 17664 17696 18032 18170 18723 18816 18960 19320 19355 19908 20160 20224 20286 20608 21804 22080 22120 22540 22752 23184 23226 23520 24885 24964 25280 25438 25760 26496 26544 26880 27048 27255 28224 28440 28980 29072 29440 30336 30912 30968 31205 31360 32706 33120 33180 33810 34839 35280 35392 36064 36340 37446 37632 37920 38157 38640 38710 39816 40320 40572 41216 43608 43687 44160 44240 45080 45504 46368 46452 47040 49770 49928 50560 50715 50876 51520 52992 53088 54096 54510 56169 56448 56880 57960 58065 58144 60672 61824 61936 62410 62720 63595 65412 66240 66360 67620 69678 70560 70784 72128 72680 74892 75840 76314 77280 77420 79632 80640 81144 81765 87216 87374 88320 88480 89033 90160 91008 92736 92904 93615 94080 99540 99856 101120 101430 101752 103040 106176 108192 109020 112338 112896 113760 114471 115920 116130 116288 123648 123872 124820 127190 130824 131061 132480 132720 135240 139356 141120 141568 143543 144256 145360 149784 151680 152628 154560 154840 159264 162288 163530 174195 174432 174748 176960 178066 180320 182016 185472 185808 187230 188160 190785 199080 199712 202860 203504 206080 212352 216384 218040 218435 224676 227520 228942 231840 232260 232576 247744 249640 254380 261648 262122 264960 265440 267099 270480 278712 280845 282240 287086 288512 290720 299568 303360 305256 305809 309120 309680 318528 324576 327060 348390 348864 349496 353920 356132 360640 370944 371616 374460 381570 393183 398160 399424 405720 407008 424704 430629 432768 436080 436870 445165 449352 455040 457884 463680 464520 465152 495488 499280 508760 523296 524244 530880 534198 540960 557424 561690 564480 572355 574172 581440 599136 610512 611618 618240 619360 637056 649152 654120 655305 696780 697728 698992 707840 712264 717715 721280 743232 748920 763140 786366 796320 798848 801297 811440 814016 861258 865536 872160 873740 890330 898704 910080 915768 917427 927360 929040 990976 998560 1004801 1017520 1046592 1048488 1061760 1068396 1081920 1114848 1123380 1144710 1148344 1162880 1198272 1221024 1223236 1238720 1274112 1291887 1298304 1308240 1310610 1335495 1393560 1395456 1397984 1424528 1435430 1442560 1486464 1497840 1526280 1529045 1572732 1592640 1597696 1602594 1622880 1628032 1722516 1744320 1747480 1780660 1797408 1831536 1834854 1854720 1858080 1965915 1997120 2009602 2035040 2093184 2096976 2123520 2136792 2153145 2163840 2229696 2246760 2289420 2296688 2325760 2396544 2442048 2446472 2477440 2583774 2596608 2616480 2621220 2670990 2752281 2787120 2795968 2849056 2870860 2972928 2995680 3014403 3052560 3058090 3145464 3185280 3205188 3245760 3256064 3445032 3488640 3494960 3561320 3594816 3663072 3669708 3716160 3931830 3994240 4006485 4019204 4070080 4186368 4193952 4273584 4306290 4327680 4459392 4493520 4578840 4587135 4593376 4793088 4884096 4892944 4954880 5024005 5167548 5232960 5242440 5341980 5504562 5574240 5591936 5698112 5741720 5991360 6028806 6105120 6116180 6290928 6370560 6410376 6459435 6491520 6890064 6977280 6989920 7033607 7122640 7189632 7326144 7339416 7432320 7863660 7988480 8012970 8038408 8140160 8387904 8547168 8612580 8918784 8987040 9043209 9157680 9174270 9186752 9768192 9785888 10048010 10335096 10465920 10484880 10683960 11009124 11148480 11183872 11396224 11483440 11982720 12057612 12210240 12232360 12581856 12820752 12918870 12983040 13761405 13780128 13979840 14067214 14245280 14379264 14652288 14678832 14864640 15072015 15727320 16025940 16076816 16280320 16775808 17094336 17225160 17974080 18086418 18315360 18348540 18373504 19571776 20096020 20670192 20931840 20969760 21100821 21367920 22018248 22296960 22792448 22966880 23965440 24115224 24420480 24464720 25163712 25641504 25837740 27522810 27560256 27959680 28134428 28490560 29304576 29357664 30144030 31454640 32051880 32153632 33551616 34188672 34450320 35168035 35948160 36172836 36630720 36697080 36747008 39143552 40192040 41340384 41939520 42201642 42735840 44036496 44593920 45216045 45933760 48230448 48840960 48929440 50327424 51283008 51675480 55045620 55120512 55919360 56268856 56981120 58715328 60288060 62909280 63302463 64103760 64307264 68377344 68900640 70336070 71896320 72345672 73261440 73394160 78287104 80384080 82680768 83879040 84403284 85471680 88072992 90432090 91867520 96460896 97858880 100654848 102566016 103350960 105504105 110091240 110241024 112537712 113962240 117430656 120576120 125818560 126604926 128207520 128614528 137801280 140672140 144691344 146522880 146788320 160768160 165361536 167758080 168806568 170943360 176145984 180864180 183735040 192921792 195717760 205132032 206701920 211008210 220182480 225075424 234861312 241152240 251637120 253209852 256415040 257229056 275602560 281344280 289382688 293576640 316512315 321536320 330723072 337613136 341886720 352291968 361728360 385843584 391435520 413403840 422016420 440364960 450150848 482304480 503274240 506419704 512830080 551205120 562688560 578765376 587153280 633024630 643072640 675226272 704583936 723456720 771687168 826807680 844032840 880729920 900301696 964608960 1012839408 1025660160 1125377120 1157530752 1174306560 1266049260 1286145280 1350452544 1446913440 1653615360 1688065680 1761459840 1800603392 1929217920 2025678816 2250754240 2315061504 2532098520 2700905088 2893826880 3376131360 3522919680 3858435840 4051357632 4501508480 5064197040 5401810176 5787653760 6752262720 8102715264 9003016960 10128394080 11575307520 13504525440 16205430528 20256788160 27009050880 40513576320 81027152640
• Sum of all divisors σ(n): 344657227824
• Sum of proper divisors (its aliquot sum) s(n): 263630075184
• 81027152640 is an abundant number, because the sum of its proper divisors (263630075184) is greater than itself. Its abundance is 182602922544

Bases of 81027152640

• Binary: 1001011011101100110000011101100000000₂
• Hexadecimal: 0x12DD983B00
• Base-36: 1181H340

Squares and roots of 81027152640

• 81027152640 squared (81027152640²) is 6565399464945858969600
• 81027152640 cubed (81027152640³) is 531975624588742444065692319744000
• The square root of 81027152640 is 284652.6877442053
• The cube root of 81027152640 is 4327.2321246059

Scales and comparisons

• 81,027,152,640 seconds is equal to 2,576 years, 21 weeks, 3 days, 6 hours, 24 minutes.
• To count from 1 to 81,027,152,640 would take you about five thousand, one hundred fifty-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 81027152640 cubic inches would be around 360.6 feet tall.

Recreational maths with 81027152640

• 81027152640 backwards is 04625172018
• 81027152640 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81027152640's digits is 36
• More coming soon!