81397430400

Names of 81397430400

• Cardinal: 81397430400 can be written as Eighty-one billion, three hundred ninety-seven million, four hundred thirty thousand, four hundred.

Scientific notation

• Scientific notation: 8.13974304 × 10¹⁰

Factors of 81397430400

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 4595

Divisors of 81397430400

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 13 15 16 20 22 24 25 26 30 32 33 39 40 44 48 50 52 55 60 64 65 66 75 78 80 88 96 100 104 110 120 128 130 132 143 150 156 160 165 169 176 192 195 200 208 220 240 260 264 275 286 300 312 320 325 330 338 352 384 390 400 416 429 440 480 507 520 528 550 572 600 624 640 650 660 676 704 715 780 800 825 832 845 858 880 960 975 1014 1040 1056 1100 1144 1200 1248 1300 1320 1352 1408 1430 1560 1600 1650 1664 1690 1716 1760 1859 1920 1950 2028 2080 2112 2145 2200 2288 2400 2496 2535 2600 2640 2704 2860 3120 3200 3300 3380 3432 3520 3575 3718 3900 4056 4160 4224 4225 4290 4400 4561 4576 4800 4992 5070 5200 5280 5408 5577 5720 6240 6600 6760 6864 7040 7150 7436 7800 8112 8320 8450 8580 8800 9122 9152 9295 9600 10140 10400 10560 10725 10816 11154 11440 12480 12675 13200 13520 13683 13728 14300 14872 15600 16224 16900 17160 17600 18244 18304 18590 20280 20800 21120 21450 21632 22308 22805 22880 24960 25350 26400 27040 27366 27456 27885 28600 29744 31200 32448 33800 34320 35200 36488 37180 40560 41600 42900 44616 45610 45760 46475 50171 50700 52800 54080 54732 54912 55770 57200 59293 59488 62400 64896 67600 68415 68640 72976 74360 81120 85800 89232 91220 91520 92950 100342 101400 105600 108160 109464 111540 114025 114400 118586 118976 124800 135200 136830 137280 139425 145952 148720 150513 162240 171600 177879 178464 182440 185900 200684 202800 218928 223080 228050 228800 237172 237952 250855 270400 273660 274560 278850 291904 296465 297440 301026 324480 342075 343200 355758 356928 364880 371800 401368 405600 437856 446160 456100 457600 474344 501710 540800 547320 557700 583808 592930 594880 602052 652223 684150 686400 711516 713856 729760 743600 752565 770809 802736 811200 875712 889395 892320 912200 948688 1003420 1094640 1115400 1185860 1189760 1204104 1254275 1304446 1368300 1372800 1423032 1459520 1482325 1487200 1505130 1541618 1605472 1622400 1751424 1778790 1784640 1824400 1897376 1956669 2006840 2189280 2230800 2312427 2371720 2408208 2508550 2608892 2736600 2846064 2919040 2964650 2974400 3010260 3083236 3210944 3261115 3557580 3569280 3648800 3762825 3794752 3854045 3913338 4013680 4378560 4446975 4461600 4624854 4743440 4816416 5017100 5217784 5473200 5692128 5929300 5948800 6020520 6166472 6421888 6522230 7115160 7297600 7525650 7589504 7708090 7826676 8027360 8478899 8757120 8893950 8923200 9249708 9486880 9632832 9783345 10034200 10435568 10946400 11384256 11562135 11858600 12041040 12332944 13044460 14230320 14595200 15051300 15416180 15653352 16054720 16305575 16957798 17787900 17846400 18499416 18973760 19265664 19270225 19566690 20068400 20871136 21892800 22768512 23124270 23717200 24082080 24665888 25436697 26088920 28460640 30102600 30832360 31306704 32109440 32611150 33915596 35575800 36998832 37947520 38540450 39133380 40136800 41742272 42394495 43785600 46248540 47434400 48164160 48916725 49331776 50873394 52177840 56921280 57810675 60205200 61664720 62613408 65222300 67831192 71151600 73997664 77080900 78266760 80273600 83484544 84788990 92497080 94868800 96328320 97833450 98663552 101746788 104355680 113842560 115621350 120410400 123329440 125226816 127183485 130444600 135662384 142303200 147995328 154161800 156533520 160547200 169577980 184994160 189737600 195666900 203493576 208711360 211972475 231242700 240820800 246658880 250453632 254366970 260889200 271324768 284606400 295990656 308323600 313067040 339155960 369988320 391333800 406987152 417422720 423944950 462485400 481641600 493317760 508733940 521778400 542649536 569212800 616647200 626134080 635917425 678311920 739976640 782667600 813974304 847889900 924970800 1017467880 1043556800 1085299072 1233294400 1252268160 1271834850 1356623840 1479953280 1565335200 1627948608 1695779800 1849941600 2034935760 2087113600 2466588800 2543669700 2713247680 3130670400 3255897216 3391559600 3699883200 4069871520 5087339400 5426495360 6261340800 6783119200 7399766400 8139743040 10174678800 13566238400 16279486080 20349357600 27132476800 40698715200 81397430400
• Sum of all divisors σ(n): 316773966240
• Sum of proper divisors (its aliquot sum) s(n): 235376535840
• 81397430400 is an abundant number, because the sum of its proper divisors (235376535840) is greater than itself. Its abundance is 153979105440

Bases of 81397430400

• Binary: 1001011110011101010100011100010000000₂
• Hexadecimal: 0x12F3AA3880
• Base-36: 11E5XF9C

Squares and roots of 81397430400

• 81397430400 squared (81397430400²) is 6625541675722844160000
• 81397430400 cubed (81397430400³) is 539302067411949577203646464000000
• The square root of 81397430400 is 285302.3490965331
• The cube root of 81397430400 is 4333.8136356507

Scales and comparisons

• 81,397,430,400 seconds is equal to 2,588 years, 9 weeks, 4 days, 21 hours, 20 minutes.
• To count from 1 to 81,397,430,400 would take you about five thousand, one hundred seventy-six 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 81397430400 cubic inches would be around 361.2 feet tall.

Recreational maths with 81397430400

• 81397430400 backwards is 00403479318
• 81397430400 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81397430400's digits is 39
• More coming soon!