31583432868 has 96 divisors (see below), whose sum is σ = 82163356800. Its totient is φ = 9375657984.

The previous prime is 31583432849. The next prime is 31583432887. The reversal of 31583432868 is 86823438513.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31583432849) and next prime (31583432887).

It is a self number, because there is not a number n which added to its sum of digits gives 31583432868.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9964788 + ... + 9967956.

It is an arithmetic number, because the mean of its divisors is an integer number (855868300).

Almost surely, 2^31583432868 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 31583432868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41081678400).

31583432868 is an abundant number, since it is smaller than the sum of its proper divisors (50579923932).

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

31583432868 is a wasteful number, since it uses less digits than its factorization.

31583432868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5421 (or 5419 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The spelling of 31583432868 in words is "thirty-one billion, five hundred eighty-three million, four hundred thirty-two thousand, eight hundred sixty-eight".