31981415960 has 32 divisors (see below), whose sum is σ = 77493432240. Its totient is φ = 11808522624.

The previous prime is 31981415959. The next prime is 31981415987. The reversal of 31981415960 is 6951418913.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 30750842 + ... + 30751881.

Almost surely, 2^31981415960 is an apocalyptic number.

It is an amenable number.

31981415960 is an abundant number, since it is smaller than the sum of its proper divisors (45512016280).

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

31981415960 is a wasteful number, since it uses less digits than its factorization.

31981415960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61502747 (or 61502743 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 31981415960 in words is "thirty-one billion, nine hundred eighty-one million, four hundred fifteen thousand, nine hundred sixty".