80687969664 has 64 divisors (see below), whose sum is σ = 218887626240. Its totient is φ = 26323728896.

The previous prime is 80687969657. The next prime is 80687969671. The reversal of 80687969664 is 46696978608.

It is an interprime number because it is at equal distance from previous prime (80687969657) and next prime (80687969671).

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

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, 2217324 + ... + 2253419.

It is an arithmetic number, because the mean of its divisors is an integer number (3420119160).

Almost surely, 2^80687969664 is an apocalyptic number.

It is an amenable number.

80687969664 is an abundant number, since it is smaller than the sum of its proper divisors (138199656576).

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

80687969664 is a wasteful number, since it uses less digits than its factorization.

80687969664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470807 (or 4470795 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 69.

The spelling of 80687969664 in words is "eighty billion, six hundred eighty-seven million, nine hundred sixty-nine thousand, six hundred sixty-four".