81531969120

Names of 81531969120

• Cardinal: 81531969120 can be written as Eighty-one billion, five hundred thirty-one million, nine hundred sixty-nine thousand, one hundred twenty.

Scientific notation

• Scientific notation: 8.153196912 × 10¹⁰

Factors of 81531969120

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 648

Divisors of 81531969120

• Number of divisors d(n): 960
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 31 32 35 36 40 42 45 48 53 54 56 60 62 63 70 72 80 81 84 90 93 96 105 106 108 112 120 124 126 135 140 144 155 159 160 162 168 180 186 189 210 212 216 217 224 240 248 252 265 270 279 280 288 310 315 318 324 336 360 371 372 378 405 420 424 432 434 465 477 480 496 504 530 540 547 558 560 567 620 630 636 648 651 672 720 742 744 756 795 810 837 840 848 864 868 930 945 954 992 1008 1060 1080 1085 1094 1113 1116 1120 1134 1240 1260 1272 1296 1302 1395 1431 1440 1484 1488 1512 1590 1620 1641 1643 1674 1680 1696 1736 1855 1860 1890 1908 1953 2016 2120 2160 2170 2188 2226 2232 2268 2385 2480 2511 2520 2544 2592 2604 2735 2790 2835 2862 2968 2976 3024 3180 3240 3255 3282 3286 3339 3348 3360 3472 3710 3720 3780 3816 3829 3906 4185 4240 4293 4320 4340 4376 4452 4464 4536 4770 4923 4929 4960 5022 5040 5088 5208 5470 5565 5580 5670 5724 5859 5936 6048 6360 6480 6510 6564 6572 6678 6696 6944 7155 7420 7440 7560 7632 7658 7812 8205 8215 8370 8480 8586 8680 8752 8904 8928 9072 9540 9765 9846 9858 10017 10044 10080 10416 10940 11130 11160 11340 11448 11487 11501 11718 11872 12555 12720 12960 13020 13128 13144 13356 13392 14310 14769 14787 14840 14880 15120 15264 15316 15624 16410 16430 16695 16740 16957 17172 17360 17504 17577 17808 18144 19080 19145 19530 19692 19716 20034 20088 20832 21465 21880 22260 22320 22680 22896 22974 23002 23436 24615 24645 25110 25440 26040 26256 26288 26712 26784 28620 28991 29295 29538 29574 29680 30051 30240 30632 31248 32820 32860 33390 33480 33914 34344 34461 34503 34720 35154 35616 38160 38290 39060 39384 39432 40068 40176 42930 43760 44307 44361 44520 44640 45360 45792 45948 46004 46872 49230 49290 50085 50220 50871 52080 52512 52576 53424 57240 57435 57505 57982 58590 59076 59148 59360 60102 61264 62496 65640 65720 66780 66960 67828 68688 68922 69006 70308 73845 73935 76320 76580 78120 78768 78864 80136 80352 84785 85860 86973 87520 87885 88614 88722 89040 90720 91896 92008 93744 98460 98580 100170 100440 101742 103383 103509 104160 106848 114480 114870 115010 115964 117180 118152 118296 118699 120204 122528 131280 131440 133083 133560 133920 135656 137376 137844 138012 140616 144955 147690 147870 150255 152613 153160 156240 157536 157728 160272 169570 171720 172305 172515 173946 175770 177228 177444 178080 183792 184016 187488 196920 197160 200340 200880 202937 203484 206766 207018 221535 221805 228960 229740 230020 231928 234360 236304 236592 237398 240408 254355 260919 262560 262880 266166 267120 271312 275688 276024 281232 289910 295380 295740 300510 305226 306320 310149 310527 312480 320544 339140 343440 344610 345030 347892 351540 354456 354888 356097 367584 368032 393840 394320 400680 401760 405874 406968 413532 414036 434865 443070 443610 457839 459480 460040 463856 468720 472608 473184 474796 480816 508710 516915 517545 521838 532332 534240 542624 551376 552048 562464 579820 590760 591480 593495 601020 608811 610452 612640 620298 621054 665415 678280 686880 689220 690060 695784 703080 708912 709776 712194 763065 782757 787680 788640 801360 811748 813936 827064 828072 869730 886140 887220 898721 915678 918960 920080 927712 931581 937440 949592 961632 1014685 1017420 1033830 1035090 1043676 1064664 1068291 1102752 1104096 1159640 1181520 1182960 1186990 1202040 1217622 1220904 1240596 1242108 1304595 1330830 1356560 1373517 1378440 1380120 1391568 1406160 1417824 1419552 1424388 1526130 1550745 1552635 1565514 1602720 1623496 1627872 1654128 1656144 1739460 1772280 1774440 1780485 1797442 1826433 1831356 1837920 1840160 1863162 1899184 2029370 2034840 2067660 2070180 2087352 2129328 2136582 2289195 2319280 2348271 2363040 2365920 2373980 2404080 2435244 2441808 2481192 2484216 2609190 2661660 2696163 2713120 2747034 2756880 2760240 2783136 2812320 2848776 3044055 3052260 3101490 3105270 3131028 3204873 3246992 3308256 3312288 3478920 3544560 3548880 3560970 3594884 3652866 3662712 3726324 3798368 3913785 4058740 4069680 4135320 4140360 4174704 4258656 4273164 4493605 4578390 4638560 4657905 4696542 4747960 4808160 4870488 4883616 4962384 4968432 5218380 5323320 5341455 5392326 5479299 5494068 5513760 5520480 5697552 6088110 6104520 6202980 6210540 6262056 6291047 6409746 6493984 6867585 6957840 7089120 7097760 7121940 7189768 7305732 7325424 7452648 7827570 8088489 8117480 8139360 8270640 8280720 8349408 8546328 8987210 9132165 9156780 9315810 9393084 9495920 9614619 9740976 9924768 9936864 10436760 10646640 10682910 10784652 10958598 10988136 11395104 11741355 12176220 12209040 12405960 12421080 12524112 12582094 12819492 13480815 13735170 13915680 14243880 14379536 14611464 14650848 14905296 15655140 16024365 16176978 16234960 16437897 16541280 16561440 17092656 17974420 18264330 18313560 18631620 18786168 18873141 18991840 19229238 19481952 20873520 21293280 21365820 21569304 21917196 21976272 23482710 24265467 24352440 24418080 24811920 24842160 25048224 25164188 25638984 26961630 27396495 27470340 28487760 28759072 29222928 29810592 31310280 31455235 32048730 32353956 32469920 32875794 34185312 35948840 36528660 36627120 37263240 37572336 37746282 38458476 40442445 41747040 42731640 43138608 43834392 43952544 46965420 48073095 48530934 48704880 49623840 49684320 50328376 51277968 53923260 54792990 54940680 56619423 56975520 58445856 62620560 62910470 64097460 64707912 65751588 71897680 72796401 73057320 73254240 74526480 75144672 75492564 76916952 80884890 82189485 85463280 86277216 87668784 93930840 94365705 96146190 97061868 97409760 100656752 102555936 107846520 109585980 109881360 113238846 121327335 125241120 125820940 128194920 129415824 131503176 143795360 145592802 146114640 149052960 150985128 153833904 161769780 164378970 169858269 170926560 175337568 187861680 188731410 192292380 194123736 201313504 215693040 219171960 219762720 226477692 242654670 251641880 256389840 258831648 263006352 283097115 291185604 292229280 301970256 307667808 323539560 328757940 339716538 363982005 375723360 377462820 384584760 388247472 431386080 438343920 452955384 485309340 503283760 509574807 512779680 526012704 566194230 582371208 603940512 647079120 657515880 679433076 727964010 754925640 769169520 776494944 849291345 876687840 905910768 970618680 1006567520 1019149614 1132388460 1164742416 1294158240 1315031760 1358866152 1455928020 1509851280 1538339040 1698582690 1811821536 1941237360 2038299228 2264776920 2329484832 2547874035 2630063520 2717732304 2911856040 3019702560 3397165380 3882474720 4076598456 4529553840 5095748070 5435464608 5823712080 6794330760 8153196912 9059107680 10191496140 11647424160 13588661520 16306393824 20382992280 27177323040 40765984560 81531969120
• Sum of all divisors σ(n): 346490597376
• Sum of proper divisors (its aliquot sum) s(n): 264958628256
• 81531969120 is an abundant number, because the sum of its proper divisors (264958628256) is greater than itself. Its abundance is 183426659136

Bases of 81531969120

• Binary: 1001011111011101011110001111001100000₂
• Hexadecimal: 0x12FBAF1E60
• Base-36: 11GE1200

Squares and roots of 81531969120

• 81531969120 squared (81531969120²) is 6647461988584633574400
• 81531969120 cubed (81531969120³) is 541980665579656137094496022528000
• The square root of 81531969120 is 285538.0344542565
• The cube root of 81531969120 is 4336.2000532917

Scales and comparisons

• 81,531,969,120 seconds is equal to 2,592 years, 24 weeks, 1 day, 1 hour, 12 minutes.
• To count from 1 to 81,531,969,120 would take you about five thousand, one hundred eighty-four 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 81531969120 cubic inches would be around 361.4 feet tall.

Recreational maths with 81531969120

• 81531969120 backwards is 02196913518
• 81531969120 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81531969120's digits is 45
• More coming soon!