80621617056 has 24 divisors (see below), whose sum is σ = 211631745024. Its totient is φ = 26873872320.

The previous prime is 80621617009. The next prime is 80621617073. The reversal of 80621617056 is 65071612608.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 80621616999 and 80621617017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419904160 + ... + 419904351.

It is an arithmetic number, because the mean of its divisors is an integer number (8817989376).

Almost surely, 2^80621617056 is an apocalyptic number.

It is an amenable number.

80621617056 is an abundant number, since it is smaller than the sum of its proper divisors (131010127968).

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

80621617056 is a wasteful number, since it uses less digits than its factorization.

80621617056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839808524 (or 839808516 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 80621617056 in words is "eighty billion, six hundred twenty-one million, six hundred seventeen thousand, fifty-six".