31395232968 has 64 divisors (see below), whose sum is σ = 85647525120. Its totient is φ = 9511022400.

The previous prime is 31395232879. The next prime is 31395233029. The reversal of 31395232968 is 86923259313.

It is a Cunningham number, because it is equal to 177187²-1.

It is a super-2 number, since 2×31395232968² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31395232968.

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, 1048363 + ... + 1077893.

It is an arithmetic number, because the mean of its divisors is an integer number (1338242580).

Almost surely, 2^31395232968 is an apocalyptic number.

It is an amenable number.

31395232968 is an abundant number, since it is smaller than the sum of its proper divisors (54252292152).

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

31395232968 is a wasteful number, since it uses less digits than its factorization.

31395232968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33578 (or 33574 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 51.

The spelling of 31395232968 in words is "thirty-one billion, three hundred ninety-five million, two hundred thirty-two thousand, nine hundred sixty-eight".