636445130640056 has 16 divisors (see below), whose sum is σ = 1193335802348400. Its totient is φ = 318222250013824.

The previous prime is 636445130640037. The next prime is 636445130640083. The reversal of 636445130640056 is 650046031544636.

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, 30721916 + ... + 47082123.

It is an arithmetic number, because the mean of its divisors is an integer number (74583487646775).

Almost surely, 2^{636445130640056} is an apocalyptic number.

It is an amenable number.

636445130640056 is a deficient number, since it is larger than the sum of its proper divisors (556890671708344).

636445130640056 is a wasteful number, since it uses less digits than its factorization.

636445130640056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78826558 (or 78826554 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 53.

The spelling of 636445130640056 in words is "six hundred thirty-six trillion, four hundred forty-five billion, one hundred thirty million, six hundred forty thousand, fifty-six".