31378117824 has 56 divisors (see below), whose sum is σ = 92245860720. Its totient is φ = 10459372032.

The previous prime is 31378117817. The next prime is 31378117861. The reversal of 31378117824 is 42871187313.

It is a self number, because there is not a number n which added to its sum of digits gives 31378117824.

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 7 ways as a sum of consecutive naturals, for example, 9077589 + ... + 9081044.

Almost surely, 2^31378117824 is an apocalyptic number.

It is an amenable number.

31378117824 is an abundant number, since it is smaller than the sum of its proper divisors (60867742896).

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

31378117824 is a wasteful number, since it uses less digits than its factorization.

31378117824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18158654 (or 18158638 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The spelling of 31378117824 in words is "thirty-one billion, three hundred seventy-eight million, one hundred seventeen thousand, eight hundred twenty-four".