636646036 has 12 divisors (see below), whose sum is σ = 1199833012. Its totient is φ = 293836608.

The previous prime is 636646007. The next prime is 636646051. The reversal of 636646036 is 630646636.

636646036 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 372258436 + 264387600 = 19294^2 + 16260^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 636646036.

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, 6121545 + ... + 6121648.

Almost surely, 2^636646036 is an apocalyptic number.

It is an amenable number.

636646036 is a deficient number, since it is larger than the sum of its proper divisors (563186976).

636646036 is a wasteful number, since it uses less digits than its factorization.

636646036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12243210 (or 12243208 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 40.

The square root of 636646036 is about 25231.8456716904. The cubic root of 636646036 is about 860.2658435395.

The spelling of 636646036 in words is "six hundred thirty-six million, six hundred forty-six thousand, thirty-six".