80657209664 has 56 divisors (see below), whose sum is σ = 161063818080. Its totient is φ = 40075006464.

The previous prime is 80657209657. The next prime is 80657209667. The reversal of 80657209664 is 46690275608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80657209667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6749807 + ... + 6761745.

Almost surely, 2^80657209664 is an apocalyptic number.

It is an amenable number.

80657209664 is a deficient number, since it is larger than the sum of its proper divisors (80406608416).

80657209664 is a wasteful number, since it uses less digits than its factorization.

80657209664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12607 (or 12597 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 80657209664 in words is "eighty billion, six hundred fifty-seven million, two hundred nine thousand, six hundred sixty-four".