691653064 has 16 divisors (see below), whose sum is σ = 1298286720. Its totient is φ = 345443280.

The previous prime is 691653043. The next prime is 691653073. The reversal of 691653064 is 460356196.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40164 + ... + 54739.

It is an arithmetic number, because the mean of its divisors is an integer number (81142920).

Almost surely, 2^691653064 is an apocalyptic number.

It is an amenable number.

691653064 is a deficient number, since it is larger than the sum of its proper divisors (606633656).

691653064 is a wasteful number, since it uses less digits than its factorization.

691653064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95820 (or 95816 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 691653064 is about 26299.2977853022. The cubic root of 691653064 is about 884.3607005875.

The spelling of 691653064 in words is "six hundred ninety-one million, six hundred fifty-three thousand, sixty-four".