316445643728 has 20 divisors (see below), whose sum is σ = 619434194820. Its totient is φ = 156591657984.

The previous prime is 316445643707. The next prime is 316445643737. The reversal of 316445643728 is 827346544613.

It can be written as a sum of positive squares in 2 ways, for example, as 254189405584 + 62256238144 = 504172^2 + 249512^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 316445643728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101946143 + ... + 101949246.

It is an arithmetic number, because the mean of its divisors is an integer number (30971709741).

Almost surely, 2^316445643728 is an apocalyptic number.

It is an amenable number.

316445643728 is a deficient number, since it is larger than the sum of its proper divisors (302988551092).

316445643728 is a wasteful number, since it uses less digits than its factorization.

316445643728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203895494 (or 203895488 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 53.

The spelling of 316445643728 in words is "three hundred sixteen billion, four hundred forty-five million, six hundred forty-three thousand, seven hundred twenty-eight".