31399056156 has 48 divisors (see below), whose sum is σ = 79230412800. Its totient is φ = 9620812992.

The previous prime is 31399056121. The next prime is 31399056163. The reversal of 31399056156 is 65165099313.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383796 + ... + 458363.

It is an arithmetic number, because the mean of its divisors is an integer number (1650633600).

Almost surely, 2^31399056156 is an apocalyptic number.

It is an amenable number.

31399056156 is an abundant number, since it is smaller than the sum of its proper divisors (47831356644).

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

31399056156 is a wasteful number, since it uses less digits than its factorization.

31399056156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842418 (or 842416 counting only the distinct ones).

The product of its (nonzero) digits is 656100, while the sum is 48.

The spelling of 31399056156 in words is "thirty-one billion, three hundred ninety-nine million, fifty-six thousand, one hundred fifty-six".