80918305664 has 64 divisors (see below), whose sum is σ = 184305391200. Its totient is φ = 34665768960.

The previous prime is 80918305639. The next prime is 80918305691. The reversal of 80918305664 is 46650381908.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×80918305664³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2482754 + ... + 2515134.

Almost surely, 2^80918305664 is an apocalyptic number.

It is an amenable number.

80918305664 is an abundant number, since it is smaller than the sum of its proper divisors (103387085536).

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

80918305664 is a wasteful number, since it uses less digits than its factorization.

80918305664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35191 (or 35179 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 80918305664 in words is "eighty billion, nine hundred eighteen million, three hundred five thousand, six hundred sixty-four".