31608508688 has 20 divisors (see below), whose sum is σ = 61313307468. Its totient is φ = 15785719680.

The previous prime is 31608508643. The next prime is 31608508693. The reversal of 31608508688 is 88680580613.

It can be written as a sum of positive squares in 2 ways, for example, as 4333325584 + 27275183104 = 65828^2 + 165152^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 1144343 + ... + 1171638.

Almost surely, 2^31608508688 is an apocalyptic number.

It is an amenable number.

31608508688 is a deficient number, since it is larger than the sum of its proper divisors (29704798780).

31608508688 is a wasteful number, since it uses less digits than its factorization.

31608508688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316842 (or 2316836 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 31608508688 in words is "thirty-one billion, six hundred eight million, five hundred eight thousand, six hundred eighty-eight".