81723145790

Names of 81723145790

• Cardinal: 81723145790 can be written as Eighty-one billion, seven hundred twenty-three million, one hundred forty-five thousand, seven hundred ninety.

Scientific notation

• Scientific notation: 8.172314579 × 10¹⁰

Factors of 81723145790

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 355

Divisors of 81723145790

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 5 10 11 13 17 22 26 29 34 37 55 58 65 74 85 110 130 143 145 169 170 185 187 221 241 286 290 319 338 370 374 377 407 442 481 482 493 629 638 715 754 814 845 935 962 986 1073 1105 1205 1258 1430 1595 1690 1859 1870 1885 2035 2146 2210 2405 2410 2431 2465 2651 2873 3133 3145 3190 3718 3770 4070 4097 4147 4810 4862 4901 4930 5291 5302 5365 5423 5746 6253 6266 6290 6409 6919 6989 8177 8194 8294 8917 9295 9802 10582 10730 10846 11803 12155 12506 12818 13255 13838 13949 13978 14365 15665 16354 17834 18241 18590 20485 20735 23606 24310 24505 26455 26510 27115 27898 28730 31265 31330 31603 32045 34463 34595 34945 36482 40729 40885 40970 41470 44585 45067 49010 52910 53261 53911 54230 59015 62530 63206 64090 68783 68926 69190 69745 69890 70499 76879 81458 81770 83317 89170 89947 90134 90857 91205 98087 106301 106522 107822 115921 118030 118813 137566 139490 140998 151589 153439 153758 158015 166634 172315 179894 181337 181714 182410 196174 200651 203645 212602 225335 231842 237133 237626 258593 266305 269555 303178 306878 316030 343915 344630 352495 362674 384395 401302 407290 416585 448019 449735 450670 454285 474266 490435 517186 531505 532610 539110 579605 585871 594065 687830 692393 704990 757945 767195 768790 833170 896038 899470 906685 908570 916487 980870 999427 1003255 1063010 1159210 1169311 1171742 1181141 1185665 1188130 1275131 1292965 1306943 1384786 1506973 1515890 1534390 1544569 1667479 1813370 1832974 1970657 1994707 1998854 2006510 2240095 2338622 2362282 2371330 2550262 2585930 2608463 2613886 2844523 2929355 3013946 3082729 3089138 3334958 3361709 3461965 3941314 3989414 4396081 4480190 4582435 4997135 5216926 5689046 5846555 5858710 5905705 6165458 6375655 6534715 6723418 6923930 7534865 7616323 7722845 8337395 8792162 9164870 9853285 9973535 9994270 11693110 11811410 12751310 12992551 13042315 13069430 14222615 15069730 15232646 15413645 15445690 16576703 16674790 16808545 16990259 19706570 19947070 20079397 21677227 21980405 25618541 25985102 26084630 28445230 30827290 33153406 33617090 33910019 33980518 36978799 38081615 40158794 43354454 43702217 43960810 48356891 51237082 57149053 64962755 67820038 73957598 76163230 82883515 84951295 87404434 96713782 100396985 108386135 114298106 128092705 129925510 165767030 169550095 169902590 184893995 200793970 216772270 218511085 220873367 241784455 256185410 281803951 285745265 339100190 369787990 437022170 441746734 480724387 483568910 563607902 571490530 628639583 742937689 961448774 1104366835 1257279166 1409019755 1485875378 2208733670 2403621935 2818039510 3143197915 3714688445 4807243870 6286395830 7429376890 8172314579 16344629158 40861572895 81723145790
• Sum of all divisors σ(n): 196289723520
• Sum of proper divisors (its aliquot sum) s(n): 114566577730
• 81723145790 is an abundant number, because the sum of its proper divisors (114566577730) is greater than itself. Its abundance is 32843431940

Bases of 81723145790

• Binary: 1001100000111000101000011111000111110₂
• Hexadecimal: 0x1307143E3E
• Base-36: 11JJUMV2

Squares and roots of 81723145790

• 81723145790 squared (81723145790²) is 6678672557813594724100
• 81723145790 cubed (81723145790³) is 545802131125872605281599126539000
• The square root of 81723145790 is 285872.6041263835
• The cube root of 81723145790 is 4339.5865907265

Scales and comparisons

• 81,723,145,790 seconds is equal to 2,598 years, 28 weeks, 1 day, 17 hours, 49 minutes, 50 seconds.
• To count from 1 to 81,723,145,790 would take you about five thousand, one hundred ninety-seven 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 81723145790 cubic inches would be around 361.6 feet tall.

Recreational maths with 81723145790

• 81723145790 backwards is 09754132718
• The number of decimal digits it has is: 11
• The sum of 81723145790's digits is 47
• More coming soon!