81022401390

Names of 81022401390

• Cardinal: 81022401390 can be written as Eighty-one billion, twenty-two million, four hundred one thousand, three hundred ninety.

Scientific notation

• Scientific notation: 8.102240139 × 10¹⁰

Factors of 81022401390

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 13304217

Divisors of 81022401390

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 21 29 30 35 42 58 70 87 105 145 174 203 210 290 406 435 609 870 1015 1218 2030 3045 6090 13304171 26608342 39912513 66520855 79825026 93129197 133041710 186258394 199562565 279387591 385820959 399125130 465645985 558775182 771641918 931291970 1157462877 1396937955 1929104795 2314925754 2700746713 2793875910 3858209590 5401493426 5787314385 8102240139 11574628770 13503733565 16204480278 27007467130 40511200695 81022401390
• Sum of all divisors σ(n): 229896092160
• Sum of proper divisors (its aliquot sum) s(n): 148873690770
• 81022401390 is an abundant number, because the sum of its proper divisors (148873690770) is greater than itself. Its abundance is 67851289380

Bases of 81022401390

• Binary: 1001011011101010011111011101101101110₂
• Hexadecimal: 0x12DD4FBB6E
• Base-36: 117YN90U

Squares and roots of 81022401390

• 81022401390 squared (81022401390²) is 6564629527002273932100
• 81022401390 cubed (81022401390³) is 531882048513424081969339805619000
• The square root of 81022401390 is 284644.3419251471
• The cube root of 81022401390 is 4327.1475432327

Scales and comparisons

• 81,022,401,390 seconds is equal to 2,576 years, 13 weeks, 4 days, 6 hours, 36 minutes, 30 seconds.
• To count from 1 to 81,022,401,390 would take you about five thousand, one hundred fifty-two 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 81022401390 cubic inches would be around 360.6 feet tall.

Recreational maths with 81022401390

• 81022401390 backwards is 09310422018
• 81022401390 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81022401390's digits is 30
• More coming soon!