318625638728 has 16 divisors (see below), whose sum is σ = 599579838780. Its totient is φ = 158737681728.

The previous prime is 318625638691. The next prime is 318625638757. The reversal of 318625638728 is 827836526813.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 308689137604 + 9936501124 = 555598^2 + 99682^2 .

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 3 ways as a sum of consecutive naturals, for example, 71889851 + ... + 71894282.

Almost surely, 2^318625638728 is an apocalyptic number.

It is an amenable number.

318625638728 is a deficient number, since it is larger than the sum of its proper divisors (280954200052).

318625638728 is a wasteful number, since it uses less digits than its factorization.

318625638728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143784416 (or 143784412 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 59.

The spelling of 318625638728 in words is "three hundred eighteen billion, six hundred twenty-five million, six hundred thirty-eight thousand, seven hundred twenty-eight".