636394006364 has 6 divisors (see below), whose sum is σ = 1113689511144. Its totient is φ = 318197003180.

The previous prime is 636394006363. The next prime is 636394006387. The reversal of 636394006364 is 463600493636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636394006363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79549250792 + ... + 79549250799.

It is an arithmetic number, because the mean of its divisors is an integer number (185614918524).

Almost surely, 2^636394006364 is an apocalyptic number.

It is an amenable number.

636394006364 is a deficient number, since it is larger than the sum of its proper divisors (477295504780).

636394006364 is a wasteful number, since it uses less digits than its factorization.

636394006364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159098501595 (or 159098501593 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 50.

The spelling of 636394006364 in words is "six hundred thirty-six billion, three hundred ninety-four million, six thousand, three hundred sixty-four".