81425402240

Names of 81425402240

• Cardinal: 81425402240 can be written as Eighty-one billion, four hundred twenty-five million, four hundred two thousand, two hundred forty.

Scientific notation

• Scientific notation: 8.142540224 × 10¹⁰

Factors of 81425402240

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 822

Divisors of 81425402240

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 16 20 23 26 28 32 35 40 46 52 56 64 65 70 80 89 91 92 104 112 115 128 130 140 160 161 178 182 184 208 224 230 260 280 299 320 322 356 364 368 416 445 448 455 460 520 560 598 623 640 644 683 712 728 736 805 832 890 896 910 920 1040 1120 1157 1196 1246 1288 1366 1424 1456 1472 1495 1610 1664 1780 1820 1840 2047 2080 2093 2240 2314 2392 2492 2576 2732 2848 2912 2944 2990 3115 3220 3415 3560 3640 3680 4094 4160 4186 4480 4628 4781 4784 4984 5152 5464 5696 5785 5824 5980 6230 6440 6830 7120 7280 7360 8099 8188 8320 8372 8879 9256 9562 9568 9968 10235 10304 10465 10928 11392 11570 11648 11960 12460 12880 13660 14240 14329 14560 14720 15709 16198 16376 16744 17758 18512 19124 19136 19936 20470 20608 20930 21856 23140 23905 23920 24920 25760 26611 27320 28480 28658 29120 31418 32396 32752 33488 35516 37024 38248 38272 39872 40495 40940 41860 43712 44395 46280 47810 47840 49840 51520 53222 54640 56960 57316 58240 60787 62153 62836 64792 65504 66976 71032 71645 74048 76496 78545 79744 80990 81880 83720 87424 88790 92560 95620 95680 99680 103040 106444 109280 109963 114632 121574 124306 125672 129584 131008 133055 133952 142064 143290 148096 152992 157090 161980 163760 167440 177580 185120 186277 191240 191360 199360 204217 212888 218560 219926 229264 243148 248612 251344 259168 262016 266110 267904 284128 286580 303935 305984 310765 314180 323960 327520 334880 355160 370240 372554 382480 398720 408434 425509 425776 437120 439852 458528 486296 497224 502688 518336 532220 549815 568256 573160 607870 611968 621530 628360 647920 655040 669760 710320 740480 745108 764960 790231 816868 851018 851552 879704 917056 931385 972592 994448 1005376 1021085 1036672 1064440 1099630 1136512 1146320 1215740 1243060 1256720 1295840 1310080 1339520 1398101 1420640 1429519 1490216 1529920 1580462 1633736 1702036 1703104 1759408 1834112 1862770 1945184 1988896 2010752 2042170 2127545 2128880 2199260 2292640 2431480 2486120 2513440 2591680 2796202 2841280 2859038 2980432 3059840 3160924 3267472 3404072 3406208 3518816 3725540 3890368 3951155 3977792 4084340 4255090 4257760 4398520 4585280 4862960 4972240 5026880 5183360 5531617 5592404 5682560 5718076 5960864 6321848 6534944 6808144 6990505 7037632 7147595 7451080 7780736 7902310 7955584 8168680 8510180 8515520 8797040 9170560 9725920 9786707 9944480 10053760 11063234 11184808 11436152 11921728 12643696 13069888 13616288 13981010 14075264 14295190 14902160 15804620 16337360 17020360 17031040 17594080 18175313 19451840 19573414 19888960 22126468 22369616 22872304 23843456 25287392 26139776 27232576 27658085 27962020 28590380 29804320 31609240 32674720 34040720 35188160 36350626 38903680 39146828 39777920 44252936 44739232 45744608 48933535 50574784 54465152 55316170 55924040 57180760 59608640 63218480 65349440 68081440 70376320 72701252 78293656 88505872 89478464 90876565 91489216 97867070 101149568 110632340 111848080 114361520 119217280 126436960 127227191 130698880 136162880 145402504 156587312 177011744 178956928 181753130 182978432 195734140 221264680 223696160 228723040 252873920 254454382 272325760 290805008 313174624 354023488 363506260 391468280 442529360 447392320 457446080 505747840 508908764 581610016 626349248 636135955 708046976 727012520 782936560 885058720 894784640 914892160 1017817528 1163220032 1252698496 1272271910 1454025040 1565873120 1770117440 2035635056 2326440064 2544543820 2908050080 3131746240 3540234880 4071270112 5089087640 5816100160 6263492480 8142540224 10178175280 11632200320 16285080448 20356350560 40712701120 81425402240
• Sum of all divisors σ(n): 253174118400
• Sum of proper divisors (its aliquot sum) s(n): 171748716160
• 81425402240 is an abundant number, because the sum of its proper divisors (171748716160) is greater than itself. Its abundance is 90323313920

Bases of 81425402240

• Binary: 1001011110101010101010000100110000000₂
• Hexadecimal: 0x12F5550980
• Base-36: 11EMKYGW

Squares and roots of 81425402240

• 81425402240 squared (81425402240²) is 6630096129945797017600
• 81425402240 cubed (81425402240³) is 539858244270703831555472359424000
• The square root of 81425402240 is 285351.3662837451
• The cube root of 81425402240 is 4334.3100102805

Scales and comparisons

• 81,425,402,240 seconds is equal to 2,589 years, 3 weeks, 6 days, 15 hours, 17 minutes, 20 seconds.
• To count from 1 to 81,425,402,240 would take you about five thousand, one hundred seventy-eight 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 81425402240 cubic inches would be around 361.2 feet tall.

Recreational maths with 81425402240

• 81425402240 backwards is 04220452418
• 81425402240 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81425402240's digits is 32
• More coming soon!