31382378656 has 24 divisors (see below), whose sum is σ = 62949798324. Its totient is φ = 15395128320.

The previous prime is 31382378639. The next prime is 31382378663. The reversal of 31382378656 is 65687328313.

It can be written as a sum of positive squares in 2 ways, for example, as 29958071056 + 1424307600 = 173084^2 + 37740^2 .

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, 9250185 + ... + 9253576.

Almost surely, 2^31382378656 is an apocalyptic number.

It is an amenable number.

31382378656 is an abundant number, since it is smaller than the sum of its proper divisors (31567419668).

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

31382378656 is a wasteful number, since it uses less digits than its factorization.

31382378656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18503824 (or 18503816 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The spelling of 31382378656 in words is "thirty-one billion, three hundred eighty-two million, three hundred seventy-eight thousand, six hundred fifty-six".