31013640896 has 56 divisors (see below), whose sum is σ = 70543558176. Its totient is φ = 13252055040.

The previous prime is 31013640857. The next prime is 31013640901. The reversal of 31013640896 is 69804631013.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48266 + ... + 253686.

It is an arithmetic number, because the mean of its divisors is an integer number (1259706396).

Almost surely, 2^31013640896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013640896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35271779088).

31013640896 is an abundant number, since it is smaller than the sum of its proper divisors (39529917280).

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

31013640896 is a wasteful number, since it uses less digits than its factorization.

31013640896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205777 (or 205767 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 31013640896 in words is "thirty-one billion, thirteen million, six hundred forty thousand, eight hundred ninety-six".