636697636364 has 12 divisors (see below), whose sum is σ = 1114226799504. Its totient is φ = 318347122224.

The previous prime is 636697636357. The next prime is 636697636429. The reversal of 636697636364 is 463636796636.

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 636697636364.

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, 838202 + ... + 1405694.

It is an arithmetic number, because the mean of its divisors is an integer number (92852233292).

Almost surely, 2^636697636364 is an apocalyptic number.

It is an amenable number.

636697636364 is a deficient number, since it is larger than the sum of its proper divisors (477529163140).

636697636364 is a wasteful number, since it uses less digits than its factorization.

636697636364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847984 (or 847982 counting only the distinct ones).

The product of its digits is 317447424, while the sum is 65.

The spelling of 636697636364 in words is "six hundred thirty-six billion, six hundred ninety-seven million, six hundred thirty-six thousand, three hundred sixty-four".