80561818657152 has 320 divisors, whose sum is σ = 280683717985440. Its totient is φ = 22456255242240.

The previous prime is 80561818657139. The next prime is 80561818657163. The reversal of 80561818657152 is 25175681816508.

80561818657152 is a `hidden beast` number, since 8 + 0 + 5 + 6 + 1 + 8 + 1 + 8 + 6 + 571 + 52 = 666.

It is a super-2 number, since 2×80561818657152² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 80561818657152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10561383 + ... + 16512614.

Almost surely, 2^{80561818657152} is an apocalyptic number.

80561818657152 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

80561818657152 is an abundant number, since it is smaller than the sum of its proper divisors (200121899328288).

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

80561818657152 is a wasteful number, since it uses less digits than its factorization.

80561818657152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27074071 (or 27074050 counting only the distinct ones).

The product of its (nonzero) digits is 32256000, while the sum is 63.

The spelling of 80561818657152 in words is "eighty trillion, five hundred sixty-one billion, eight hundred eighteen million, six hundred fifty-seven thousand, one hundred fifty-two".