81021970323240

Names of 81021970323240

• Cardinal: 81021970323240 can be written as Eighty-one trillion, twenty-one billion, nine hundred seventy million, three hundred twenty-three thousand, two hundred forty.

Scientific notation

• Scientific notation: 8.102197032324 × 10¹³

Factors of 81021970323240

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 3393

Divisors of 81021970323240

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 20 23 24 30 40 41 46 60 69 82 92 115 120 123 138 164 184 205 230 246 276 328 345 349 410 460 492 552 615 690 698 820 920 943 984 1047 1093 1230 1380 1396 1640 1745 1877 1886 2094 2186 2460 2760 2792 2829 3279 3490 3754 3772 4188 4372 4715 4920 5235 5465 5631 5658 6558 6980 7508 7544 8027 8376 8744 9385 9430 10470 10930 11262 11316 13116 13960 14145 14309 15016 16054 16395 18770 18860 20940 21860 22524 22632 24081 25139 26232 28155 28290 28618 32108 32790 37540 37720 40135 41880 42927 43171 43720 44813 45048 48162 50278 56310 56580 57236 64216 65580 71545 75080 75417 76957 80270 85854 86342 89626 96324 100556 112620 113160 114472 120405 125695 129513 131160 134439 143090 150834 153914 160540 171708 172684 179252 192648 201112 214635 215855 224065 225240 230871 240810 251390 259026 268878 286180 301668 307828 321080 329107 343416 345368 358504 377085 381457 384785 429270 431710 448130 461742 481620 502780 518052 537756 572360 603336 615656 647565 655073 658214 672195 754170 762914 769570 858540 863420 896260 923484 963240 987321 1005560 1030699 1036104 1075512 1144371 1154355 1295130 1310146 1316428 1344390 1508340 1525828 1539140 1645535 1717080 1726840 1770011 1792520 1846968 1907285 1965219 1974642 2051561 2061398 2288742 2308710 2590260 2620292 2632856 2688780 3016680 3051656 3078280 3092097 3275365 3291070 3540022 3814570 3930438 3949284 4103122 4122796 4577484 4617420 4936605 5153495 5180520 5240584 5310033 5377560 5721855 6154683 6184194 6550730 6582140 7080044 7629140 7860876 7898568 8206244 8245592 8773511 8850055 9154968 9234840 9826095 9873210 10257805 10306990 10620066 11443710 12309366 12368388 13101460 13164280 14160088 15066679 15258280 15460485 15639737 15721752 16412488 17547022 17700110 19652190 19746420 20515610 20613980 21240132 22887420 24618732 24736776 26202920 26320533 26550165 26857993 30133358 30773415 30920970 31279474 35094044 35400220 39304380 39492840 41031220 41227960 42480264 43867555 45200037 45774840 46919211 47185903 49237464 52641066 53100330 53715986 60266716 61546830 61841940 62558948 70188088 70800440 75333395 78198685 78608760 80573979 82062440 84114001 87735110 90400074 93838422 94371806 105282132 106200660 107431972 120533432 123093660 123683880 125117896 131602665 134289965 141557709 150666790 156397370 161147958 168228002 175470220 180800148 187676844 188743612 210564264 212401320 214863944 226000185 234596055 235929515 246187320 252342003 263205330 268579930 283115418 301333580 312794740 322295916 336456004 350940440 359713951 361600296 375353688 377487224 402869895 420570005 452000370 469192110 471859030 504684006 526410660 537159860 566230836 602667160 617733839 625589480 644591832 672912008 707788545 715994789 719427902 805739790 841140010 904000740 938384220 943718060 1009368012 1052821320 1074319720 1079141853 1132461672 1235467678 1261710015 1415577090 1431989578 1438855804 1611479580 1682280020 1798569755 1808001480 1853201517 1876768440 1887436120 1934622023 2018736024 2147984367 2158283706 2470935356 2523420030 2831154180 2863979156 2877711608 3088669195 3222959160 3364560040 3579973945 3597139510 3706403034 3869244046 4295968734 4316567412 4941870712 5046840060 5395709265 5662308360 5727958312 5803866069 6177338390 7159947890 7194279020 7412806068 7738488092 8591937468 8633134824 9266007585 9673110115 10093680120 10739921835 10791418530 11607732138 12354676780 14319895780 14388558040 14825612136 15476976184 16467880147 17183874936 18532015170 19346220230 21479843670 21582837060 23215464276 24709353560 28639791560 29019330345 29355786349 32935760294 37064030340 38692440460 42959687340 43165674120 46430928552 49403640441 58038660690 58711572698 65871520588 74128060680 77384880920 82339400735 85919374680 88067359047 98807280882 116077321380 117423145396 131743041176 146778931745 164678801470 176134718094 197614561764 232154642760 234846290792 247018202205 293557863490 329357602940 352269436188 395229123528 440336795235 494036404410 587115726980 658715205880 675183086027 704538872376 880673590470 988072808820 1174231453960 1350366172054 1761347180940 1976145617640 2025549258081 2700732344108 3375915430135 3522694361880 4051098516162 5401464688216 6751830860270 8102197032324 10127746290405 13503661720540 16204394064648 20255492580810 27007323441080 40510985161620 81021970323240
• Sum of all divisors σ(n): 260942000256000
• Sum of proper divisors (its aliquot sum) s(n): 179920029932760
• 81021970323240 is an abundant number, because the sum of its proper divisors (179920029932760) is greater than itself. Its abundance is 98898059609520

Bases of 81021970323240

• Binary: 10010011011000001100101110000101001011100101000₂
• Hexadecimal: 0x49B065C29728
• Base-36: SPWZ97DWO

Squares and roots of 81021970323240

• 81021970323240 squared (81021970323240²) is 6564559675059983270084097600
• 81021970323240 cubed (81021970323240³) is 531873559177847982075644645446255708224000
• The square root of 81021970323240 is 9001220.4907579061
• The cube root of 81021970323240 is 43271.3986925309

Scales and comparisons

• 81,021,970,323,240 seconds is equal to 2,576,248 years, 2 weeks, 3 hours, 34 minutes.
• To count from 1 to 81,021,970,323,240 would take you about six million, four hundred forty thousand, six hundred twenty 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 81021970323240 cubic inches would be around 3605.9 feet tall.

Recreational maths with 81021970323240

• 81021970323240 backwards is 04232307912018
• The number of decimal digits it has is: 14
• The sum of 81021970323240's digits is 42
• More coming soon!