636120428364 has 36 divisors (see below), whose sum is σ = 1607995613224. Its totient is φ = 212036908032.

The previous prime is 636120428357. The next prime is 636120428429. The reversal of 636120428364 is 463824021636.

636120428364 is a `hidden beast` number, since 6 + 3 + 61 + 204 + 28 + 364 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3971724 + ... + 4128780.

Almost surely, 2^636120428364 is an apocalyptic number.

It is an amenable number.

636120428364 is an abundant number, since it is smaller than the sum of its proper divisors (971875184860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636120428364 is a wasteful number, since it uses less digits than its factorization.

636120428364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269574 (or 269569 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 636120428364 in words is "six hundred thirty-six billion, one hundred twenty million, four hundred twenty-eight thousand, three hundred sixty-four".