31690745168 has 20 divisors (see below), whose sum is σ = 61453650048. Its totient is φ = 15831738720.

The previous prime is 31690745137. The next prime is 31690745209. The reversal of 31690745168 is 86154709613.

It is a congruent number.

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, 832928 + ... + 870143.

Almost surely, 2^31690745168 is an apocalyptic number.

It is an amenable number.

31690745168 is a deficient number, since it is larger than the sum of its proper divisors (29762904880).

31690745168 is a wasteful number, since it uses less digits than its factorization.

31690745168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704242 (or 1704236 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 31690745168 in words is "thirty-one billion, six hundred ninety million, seven hundred forty-five thousand, one hundred sixty-eight".