81612321000

Names of 81612321000

• Cardinal: 81612321000 can be written as Eighty-one billion, six hundred twelve million, three hundred twenty-one thousand.

Scientific notation

• Scientific notation: 8.1612321 × 10¹⁰

Factors of 81612321000

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 612

Divisors of 81612321000

• Number of divisors d(n): 512
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 25 28 30 35 40 42 50 56 60 70 73 75 84 100 105 120 125 139 140 146 150 168 175 200 210 219 250 278 280 292 300 350 365 375 383 417 420 438 500 511 525 556 584 600 695 700 730 750 766 834 840 875 876 973 1000 1022 1050 1095 1112 1149 1390 1400 1460 1500 1532 1533 1668 1750 1752 1825 1915 1946 2044 2085 2100 2190 2298 2555 2625 2681 2780 2919 2920 3000 3064 3066 3336 3475 3500 3650 3830 3892 4088 4170 4200 4380 4596 4865 5110 5250 5362 5475 5560 5745 5838 6132 6950 7000 7300 7660 7665 7784 8043 8340 8760 9125 9192 9575 9730 10147 10220 10425 10500 10724 10950 11490 11676 12264 12775 13405 13900 14595 14600 15320 15330 16086 16680 17375 18250 19150 19460 20294 20440 20850 21000 21448 21900 22980 23352 24325 25550 26810 27375 27800 27959 28725 29190 30441 30660 32172 34750 36500 38300 38325 38920 40215 40588 41700 43800 45960 47875 48650 50735 51100 52125 53237 53620 54750 55918 57450 58380 60882 61320 63875 64344 67025 69500 71029 72975 73000 76600 76650 80430 81176 83400 83877 95750 97300 101470 102200 104250 106474 107240 109500 111836 114900 116760 121625 121764 127750 134050 139000 139795 142058 143625 145950 152205 153300 159711 160860 167754 191500 191625 194600 195713 201075 202940 208500 212948 213087 219000 223672 229800 243250 243528 253675 255500 266185 268100 279590 284116 287250 291900 304410 306600 319422 321720 335125 335508 355145 364875 372659 383000 383250 391426 402150 405880 417000 419385 425896 426174 486500 507350 511000 532370 536200 559180 568232 574500 583800 587139 608820 638844 670250 671016 698975 710290 729750 745318 761025 766500 782852 798555 804300 838770 852348 973000 978565 1005375 1014700 1064740 1065435 1117977 1118360 1149000 1174278 1217640 1268375 1277688 1330925 1340500 1397950 1420580 1459500 1490636 1522050 1533000 1565704 1597110 1608600 1677540 1704696 1775725 1863295 1957130 2010750 2029400 2096925 2129480 2130870 2235954 2348556 2536750 2661850 2681000 2795900 2841160 2919000 2935695 2981272 3044100 3194220 3355080 3494875 3551450 3726590 3805125 3886301 3914260 3992775 4021500 4193850 4261740 4471908 4697112 4892825 5073500 5323700 5327175 5589885 5591800 5871390 6088200 6388440 6654625 6989750 7102900 7453180 7610250 7772602 7828520 7985550 8043000 8387700 8523480 8878625 8943816 9316475 9785650 10147000 10484625 10647400 10654350 11179770 11658903 11742780 13309250 13979500 14205800 14678475 14906360 15220500 15545204 15971100 16775400 17757250 18632950 19431505 19571300 19963875 20969250 21308700 22359540 23317806 23485560 24464125 26618500 26635875 27204107 27949425 27959000 29356950 30441000 31090408 31942200 35514500 37265900 38863010 39142600 39927750 41938500 42617400 44719080 46582375 46635612 48928250 53237000 53271750 54408214 55898850 58294515 58713900 71029000 73392375 74531800 77726020 79855500 81612321 83877000 93164750 93271224 97157525 97856500 106543500 108816428 111797700 116589030 117427800 136020535 139747125 146784750 155452040 159711000 163224642 186329500 194315050 195713000 213087000 217632856 223595400 233178060 272041070 279494250 291472575 293569500 326449284 372659000 388630100 408061605 466356120 485787625 544082140 558988500 582945150 587139000 652898568 680102675 777260200 816123210 971575250 1088164280 1117977000 1165890300 1360205350 1457362875 1632246420 1943150500 2040308025 2331780600 2720410700 2914725750 3264492840 3400513375 3886301000 4080616050 5440821400 5829451500 6801026750 8161232100 10201540125 11658903000 13602053500 16322464200 20403080250 27204107000 40806160500 81612321000
• Sum of all divisors σ(n): 297890611200
• Sum of proper divisors (its aliquot sum) s(n): 216278290200
• 81612321000 is an abundant number, because the sum of its proper divisors (216278290200) is greater than itself. Its abundance is 134665969200

Bases of 81612321000

• Binary: 1001100000000011110010011000011101000₂
• Hexadecimal: 0x13007930E8
• Base-36: 11HPV9WO

Squares and roots of 81612321000

• 81612321000 squared (81612321000²) is 6660570939007041000000
• 81612321000 cubed (81612321000³) is 543584653517514051352161000000000
• The square root of 81612321000 is 285678.7023913403
• The cube root of 81612321000 is 4337.6240649733

Scales and comparisons

• 81,612,321,000 seconds is equal to 2,595 years, 1 week, 1 hour, 10 minutes.
• To count from 1 to 81,612,321,000 would take you about five thousand, one hundred ninety 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 81612321000 cubic inches would be around 361.5 feet tall.

Recreational maths with 81612321000

• 81612321000 backwards is 00012321618
• 81612321000 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81612321000's digits is 24
• More coming soon!