81227708820

Names of 81227708820

• Cardinal: 81227708820 can be written as Eighty-one billion, two hundred twenty-seven million, seven hundred eight thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 8.122770882 × 10¹⁰

Factors of 81227708820

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 180

Divisors of 81227708820

• Number of divisors d(n): 270
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 73 81 90 97 108 135 146 162 180 194 219 270 291 292 324 365 388 405 438 485 540 582 657 730 810 873 876 970 1095 1164 1314 1455 1460 1620 1746 1940 1971 2190 2619 2628 2910 3285 3492 3942 4365 4380 5238 5329 5820 5913 6570 7081 7857 7884 8730 9409 9855 10476 10658 11826 13095 13140 14162 15714 15987 17460 18818 19710 21243 21316 23652 26190 26645 28227 28324 29565 31428 31974 35405 37636 39285 39420 42486 47045 47961 52380 53290 56454 59130 63729 63948 70810 78570 79935 84681 84972 94090 95922 106215 106580 112908 118260 127458 141135 141620 143883 157140 159870 169362 188180 191187 191844 212430 239805 254043 254916 282270 287766 318645 319740 338724 382374 423405 424860 431649 479610 508086 516913 564540 573561 575532 637290 686857 719415 762129 764748 846810 863298 955935 959220 1016172 1033826 1147122 1270215 1274580 1373714 1438830 1524258 1550739 1693620 1726596 1911870 2060571 2067652 2158245 2294244 2540430 2584565 2747428 2867805 2877660 3048516 3101478 3434285 3810645 3823740 4121142 4316490 4652217 5080860 5169130 5735610 6181713 6202956 6868570 7621290 7753695 8242284 8632980 9304434 10302855 10338260 11471220 12363426 13737140 13956651 15242580 15507390 18545139 18608868 20605710 23261085 24726852 27913302 30908565 31014780 37090278 41211420 41869953 46522170 50140561 55635417 55826604 61817130 69783255 74180556 83739906 92725695 93044340 100281122 111270834 123634260 139566510 150421683 167479812 185451390 200562244 209349765 222541668 250702805 278177085 279133020 300843366 370902780 418699530 451265049 501405610 556354170 601686732 752108415 837399060 902530098 1002811220 1112708340 1353795147 1504216830 1805060196 2256325245 2707590294 3008433660 4061385441 4512650490 5415180588 6768975735 8122770882 9025300980 13537951470 16245541764 20306927205 27075902940 40613854410 81227708820
• Sum of all divisors σ(n): 261043643322
• Sum of proper divisors (its aliquot sum) s(n): 179815934502
• 81227708820 is an abundant number, because the sum of its proper divisors (179815934502) is greater than itself. Its abundance is 98588225682

Bases of 81227708820

• Binary: 1001011101001100011000111100110010100₂
• Hexadecimal: 0x12E98C7994
• Base-36: 11BCVP90

Squares and roots of 81227708820

• 81227708820 squared (81227708820²) is 6597940680146705792400
• 81227708820 cubed (81227708820³) is 535935604378589372987274568968000
• The square root of 81227708820 is 285004.7522761681
• The cube root of 81227708820 is 4330.7993983361

Scales and comparisons

• 81,227,708,820 seconds is equal to 2,582 years, 41 weeks, 12 hours, 27 minutes.
• To count from 1 to 81,227,708,820 would take you about five thousand, one hundred sixty-five 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 81227708820 cubic inches would be around 360.9 feet tall.

Recreational maths with 81227708820

• 81227708820 backwards is 02880772218
• 81227708820 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81227708820's digits is 45
• More coming soon!