31503381866116 has 12 divisors (see below), whose sum is σ = 55131069078540. Its totient is φ = 15751647843680.

The previous prime is 31503381866087. The next prime is 31503381866189. The reversal of 31503381866116 is 61166818330513.

It can be written as a sum of positive squares in 2 ways, for example, as 21937326712900 + 9566055153216 = 4683730^2 + 3092904^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9098431 + ... + 12074278.

It is an arithmetic number, because the mean of its divisors is an integer number (4594255756545).

Almost surely, 2^{31503381866116} is an apocalyptic number.

It is an amenable number.

31503381866116 is a deficient number, since it is larger than the sum of its proper divisors (23627687212424).

31503381866116 is a wasteful number, since it uses less digits than its factorization.

31503381866116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21544694 (or 21544692 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 31503381866116 in words is "thirty-one trillion, five hundred three billion, three hundred eighty-one million, eight hundred sixty-six thousand, one hundred sixteen".