31328563816 has 32 divisors (see below), whose sum is σ = 66290853600. Its totient is φ = 13749211840.

The previous prime is 31328563811. The next prime is 31328563907. The reversal of 31328563816 is 61836582313.

It is not an unprimeable number, because it can be changed into a prime (31328563811) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6135490 + ... + 6140593.

It is an arithmetic number, because the mean of its divisors is an integer number (2071589175).

Almost surely, 2^31328563816 is an apocalyptic number.

It is an amenable number.

31328563816 is an abundant number, since it is smaller than the sum of its proper divisors (34962289784).

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

31328563816 is a wasteful number, since it uses less digits than its factorization.

31328563816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12276129 (or 12276125 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The spelling of 31328563816 in words is "thirty-one billion, three hundred twenty-eight million, five hundred sixty-three thousand, eight hundred sixteen".