80657400768 has 56 divisors (see below), whose sum is σ = 243892620672. Its totient is φ = 23044971264.

The previous prime is 80657400737. The next prime is 80657400781. The reversal of 80657400768 is 86700475608.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 80657400768.

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, 30005130 + ... + 30007817.

Almost surely, 2^80657400768 is an apocalyptic number.

It is an amenable number.

80657400768 is an abundant number, since it is smaller than the sum of its proper divisors (163235219904).

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

80657400768 is a wasteful number, since it uses less digits than its factorization.

80657400768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60012969 (or 60012959 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 80657400768 in words is "eighty billion, six hundred fifty-seven million, four hundred thousand, seven hundred sixty-eight".