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81027002639160 = 233251491510570519
BaseRepresentation
bin10010011011000110010001…
…101101011010001100111000
3101121220002212010111122101200
4102123012101231122030320
541110021300133423120
6444155142515214200
723032002442404024
oct2233062155321470
9347802763448350
1081027002639160
11238aa3a4690546
1291076ab2a7360
133629a76523946
141601a29329384
15957a71aa6e90
hex49b191b5a338

81027002639160 has 96 divisors (see below), whose sum is σ = 265105126260000. Its totient is φ = 21462185919744.

The previous prime is 81027002639159. The next prime is 81027002639171. The reversal of 81027002639160 is 6193620072018.

81027002639160 is a `hidden beast` number, since 8 + 1 + 0 + 2 + 7 + 0 + 0 + 2 + 639 + 1 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 755231620 + ... + 755338899.

It is an arithmetic number, because the mean of its divisors is an integer number (2761511731875).

Almost surely, 281027002639160 is an apocalyptic number.

It is an amenable number.

81027002639160 is an abundant number, since it is smaller than the sum of its proper divisors (184078123620840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81027002639160 is a wasteful number, since it uses less digits than its factorization.

81027002639160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510570685 (or 1510570678 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 81027002639160 in words is "eighty-one trillion, twenty-seven billion, two million, six hundred thirty-nine thousand, one hundred sixty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 149 180 298 360 447 596 745 894 1192 1341 1490 1788 2235 2682 2980 3576 4470 5364 5960 6705 8940 10728 13410 17880 26820 53640 1510570519 3021141038 4531711557 6042282076 7552852595 9063423114 12084564152 13595134671 15105705190 18126846228 22658557785 27190269342 30211410380 36253692456 45317115570 54380538684 60422820760 67975673355 90634231140 108761077368 135951346710 181268462280 225075007331 271902693420 450150014662 543805386840 675225021993 900300029324 1125375036655 1350450043986 1800600058648 2025675065979 2250750073310 2700900087972 3376125109965 4051350131958 4501500146620 5401800175944 6752250219930 8102700263916 9003000293240 10128375329895 13504500439860 16205400527832 20256750659790 27009000879720 40513501319580 81027002639160