691000687364 has 48 divisors (see below), whose sum is σ = 1315396031040. Its totient is φ = 315710102400.

The previous prime is 691000687331. The next prime is 691000687367. The reversal of 691000687364 is 463786000196.

It is not an unprimeable number, because it can be changed into a prime (691000687367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52108967 + ... + 52122225.

It is an arithmetic number, because the mean of its divisors is an integer number (27404083980).

Almost surely, 2^691000687364 is an apocalyptic number.

It is an amenable number.

691000687364 is a deficient number, since it is larger than the sum of its proper divisors (624395343676).

691000687364 is a wasteful number, since it uses less digits than its factorization.

691000687364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23300 (or 23298 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 691000687364 in words is "six hundred ninety-one billion, six hundred eighty-seven thousand, three hundred sixty-four".