31383684864 has 108 divisors (see below), whose sum is σ = 103413653616. Its totient is φ = 8966762496.

The previous prime is 31383684809. The next prime is 31383684877. The reversal of 31383684864 is 46848638313.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31383684864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 956829 + ... + 989084.

Almost surely, 2^31383684864 is an apocalyptic number.

It is an amenable number.

31383684864 is an abundant number, since it is smaller than the sum of its proper divisors (72029968752).

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

31383684864 is a wasteful number, since it uses less digits than its factorization.

31383684864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945942 (or 1945925 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 54.

The spelling of 31383684864 in words is "thirty-one billion, three hundred eighty-three million, six hundred eighty-four thousand, eight hundred sixty-four".