636974056 has 16 divisors (see below), whose sum is σ = 1210688100. Its totient is φ = 314123904.

The previous prime is 636974053. The next prime is 636974099. The reversal of 636974056 is 650479636.

It can be written as a sum of positive squares in 2 ways, for example, as 606833956 + 30140100 = 24634^2 + 5490^2 .

It is a super-2 number, since 2×636974056² = 811471896034182272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636973997 and 636974015.

It is not an unprimeable number, because it can be changed into a prime (636974053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544771 + ... + 545938.

Almost surely, 2^636974056 is an apocalyptic number.

It is an amenable number.

636974056 is a deficient number, since it is larger than the sum of its proper divisors (573714044).

636974056 is a wasteful number, since it uses less digits than its factorization.

636974056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090788 (or 1090784 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 636974056 is about 25238.3449536613. The cubic root of 636974056 is about 860.4135634846.

The spelling of 636974056 in words is "six hundred thirty-six million, nine hundred seventy-four thousand, fifty-six".