31994775472 has 60 divisors (see below), whose sum is σ = 72145804248. Its totient is φ = 13687590400.

The previous prime is 31994775467. The next prime is 31994775473. The reversal of 31994775472 is 27457749913.

It is not an unprimeable number, because it can be changed into a prime (31994775473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453154 + ... + 518977.

Almost surely, 2^31994775472 is an apocalyptic number.

It is an amenable number.

31994775472 is an abundant number, since it is smaller than the sum of its proper divisors (40151028776).

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

31994775472 is a wasteful number, since it uses less digits than its factorization.

31994775472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972178 (or 972161 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 58.

The spelling of 31994775472 in words is "thirty-one billion, nine hundred ninety-four million, seven hundred seventy-five thousand, four hundred seventy-two".