689613638756 has 12 divisors (see below), whose sum is σ = 1379227277568. Its totient is φ = 295548702312.

The previous prime is 689613638743. The next prime is 689613638767. The reversal of 689613638756 is 657836316986.

It is a happy number.

689613638756 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12314529236 + ... + 12314529291.

It is an arithmetic number, because the mean of its divisors is an integer number (114935606464).

Almost surely, 2^689613638756 is an apocalyptic number.

It is an amenable number.

689613638756 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

689613638756 is a wasteful number, since it uses less digits than its factorization.

689613638756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24629058538 (or 24629058536 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 68.

The spelling of 689613638756 in words is "six hundred eighty-nine billion, six hundred thirteen million, six hundred thirty-eight thousand, seven hundred fifty-six".