689438875864 has 32 divisors (see below), whose sum is σ = 1375225916400. Its totient is φ = 322904171520.

The previous prime is 689438875859. The next prime is 689438875883. The reversal of 689438875864 is 468578834986.

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, 11984109 + ... + 12041500.

Almost surely, 2^689438875864 is an apocalyptic number.

It is an amenable number.

689438875864 is a deficient number, since it is larger than the sum of its proper divisors (685787040536).

689438875864 is a wasteful number, since it uses less digits than its factorization.

689438875864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24025843 (or 24025839 counting only the distinct ones).

The product of its digits is 2229534720, while the sum is 76.

The spelling of 689438875864 in words is "six hundred eighty-nine billion, four hundred thirty-eight million, eight hundred seventy-five thousand, eight hundred sixty-four".