31393479168 has 60 divisors (see below), whose sum is σ = 90603719778. Its totient is φ = 10464491520.

The previous prime is 31393479157. The next prime is 31393479179. The reversal of 31393479168 is 86197439313.

It is a happy number.

31393479168 is a `hidden beast` number, since 3 + 1 + 3 + 9 + 3 + 479 + 168 = 666.

It is an interprime number because it is at equal distance from previous prime (31393479157) and next prime (31393479179).

It can be written as a sum of positive squares in only one way, i.e., 31184734464 + 208744704 = 176592^2 + 14448^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3401803 + ... + 3411018.

Almost surely, 2^31393479168 is an apocalyptic number.

It is an amenable number.

31393479168 is an abundant number, since it is smaller than the sum of its proper divisors (59210240610).

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

31393479168 is an equidigital number, since it uses as much as digits as its factorization.

31393479168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812845 (or 6812826 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The spelling of 31393479168 in words is "thirty-one billion, three hundred ninety-three million, four hundred seventy-nine thousand, one hundred sixty-eight".