31328766864 has 30 divisors (see below), whose sum is σ = 87677035446. Its totient is φ = 10442922240.

The previous prime is 31328766857. The next prime is 31328766893. The reversal of 31328766864 is 46866782313.

It can be written as a sum of positive squares in only one way, i.e., 30192537600 + 1136229264 = 173760^2 + 33708^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31328766864.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108780297 + ... + 108780584.

Almost surely, 2^31328766864 is an apocalyptic number.

It is an amenable number.

31328766864 is an abundant number, since it is smaller than the sum of its proper divisors (56348268582).

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

31328766864 is a wasteful number, since it uses less digits than its factorization.

31328766864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217560895 (or 217560886 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The spelling of 31328766864 in words is "thirty-one billion, three hundred twenty-eight million, seven hundred sixty-six thousand, eight hundred sixty-four".