81328140400

Names of 81328140400

• Cardinal: 81328140400 can be written as Eighty-one billion, three hundred twenty-eight million, one hundred forty thousand, four hundred.

Scientific notation

• Scientific notation: 8.13281404 × 10¹⁰

Factors of 81328140400

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 248

Divisors of 81328140400

• Number of divisors d(n): 270
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 25 26 31 40 50 52 62 65 80 100 104 124 130 155 169 197 200 208 248 260 310 325 338 394 400 403 496 520 620 650 676 775 788 806 845 985 1040 1240 1300 1352 1550 1576 1612 1690 1970 2015 2480 2561 2600 2704 3100 3152 3224 3380 3940 4030 4225 4925 5122 5200 5239 6107 6200 6448 6760 7880 8060 8450 9850 10075 10244 10478 12214 12400 12805 13520 15760 16120 16900 19700 20150 20488 20956 24428 25610 26195 30535 32240 33293 33800 38809 39400 40300 40976 41912 48856 51220 52390 61070 64025 66586 67600 77618 78800 79391 80600 83824 97712 102440 104780 122140 128050 130975 133172 152675 155236 158782 161200 166465 194045 204880 209560 244280 256100 261950 266344 305350 310472 317564 332930 388090 396955 419120 488560 504517 512200 523900 532688 610700 620944 635128 665860 776180 793910 832325 970225 1009034 1024400 1032083 1047800 1203079 1221400 1270256 1331720 1552360 1587820 1664650 1940450 1984775 2018068 2064166 2095600 2406158 2442800 2522585 2663440 3104720 3175640 3329300 3880900 3969550 4036136 4128332 4812316 5045170 5160415 6015395 6351280 6558721 6658600 7761800 7939100 8072272 8256664 9624632 10090340 10320830 12030790 12612925 13117442 13317200 15523600 15640027 15878200 16513328 19249264 20180680 20641660 24061580 25225850 25802075 26234884 30076975 31280054 31756400 32793605 40361360 41283320 48123160 50451700 51604150 52469768 60153950 62560108 65587210 78200135 82566640 96246320 100903400 103208300 104939536 120307900 125120216 131174420 156400270 163968025 201806800 203320351 206416600 240615800 250240432 262348840 312800540 327936050 391000675 406640702 412833200 481231600 524697680 625601080 655872100 782001350 813281404 1016601755 1251202160 1311744200 1564002700 1626562808 2033203510 2623488400 3128005400 3253125616 4066407020 5083008775 6256010800 8132814040 10166017550 16265628080 20332035100 40664070200 81328140400
• Sum of all divisors σ(n): 219516417312
• Sum of proper divisors (its aliquot sum) s(n): 138188276912
• 81328140400 is an abundant number, because the sum of its proper divisors (138188276912) is greater than itself. Its abundance is 56860136512

Bases of 81328140400

• Binary: 1001011101111100010001111000001110000₂
• Hexadecimal: 0x12EF88F070
• Base-36: 11D0OAR4

Squares and roots of 81328140400

• 81328140400 squared (81328140400²) is 6614266420922112160000
• 81328140400 cubed (81328140400³) is 537925988123759035213027264000000
• The square root of 81328140400 is 285180.8906641537
• The cube root of 81328140400 is 4332.5835591667

Scales and comparisons

• 81,328,140,400 seconds is equal to 2,585 years, 51 weeks, 22 hours, 6 minutes, 40 seconds.
• To count from 1 to 81,328,140,400 would take you about five thousand, one hundred seventy-one 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 81328140400 cubic inches would be around 361 feet tall.

Recreational maths with 81328140400

• 81328140400 backwards is 00404182318
• 81328140400 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81328140400's digits is 31
• More coming soon!