31164721144 has 32 divisors (see below), whose sum is σ = 59391979920. Its totient is φ = 15328473856.

The previous prime is 31164721123. The next prime is 31164721193. The reversal of 31164721144 is 44112746113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53994 + ... + 255430.

Almost surely, 2^31164721144 is an apocalyptic number.

It is an amenable number.

31164721144 is a deficient number, since it is larger than the sum of its proper divisors (28227258776).

31164721144 is a wasteful number, since it uses less digits than its factorization.

31164721144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201759 (or 201755 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The spelling of 31164721144 in words is "thirty-one billion, one hundred sixty-four million, seven hundred twenty-one thousand, one hundred forty-four".