31112990721604 has 81 divisors (see below), whose sum is σ = 60719307269439. Its totient is φ = 13939177098000.

The previous prime is 31112990721509. The next prime is 31112990721649. The reversal of 31112990721604 is 40612709921113.

The square root of 31112990721604 is 5577902.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 8712681139 + ... + 8712684709.

Almost surely, 2^{31112990721604} is an apocalyptic number.

31112990721604 is the 5577902-nd square number.

It is an amenable number.

31112990721604 is a deficient number, since it is larger than the sum of its proper divisors (29606316547835).

31112990721604 is an frugal number, since it uses more digits than its factorization.

31112990721604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7310 (or 3655 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 31112990721604 in words is "thirty-one trillion, one hundred twelve billion, nine hundred ninety million, seven hundred twenty-one thousand, six hundred four".