31933887648 has 96 divisors (see below), whose sum is σ = 93186842112. Its totient is φ = 9508838400.

The previous prime is 31933887611. The next prime is 31933887659. The reversal of 31933887648 is 84678833913.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 31933887591 and 31933887600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374023 + ... + 451398.

It is an arithmetic number, because the mean of its divisors is an integer number (970696272).

Almost surely, 2^31933887648 is an apocalyptic number.

It is an amenable number.

31933887648 is an abundant number, since it is smaller than the sum of its proper divisors (61252954464).

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

31933887648 is a wasteful number, since it uses less digits than its factorization.

31933887648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825478 (or 825470 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The spelling of 31933887648 in words is "thirty-one billion, nine hundred thirty-three million, eight hundred eighty-seven thousand, six hundred forty-eight".