636097947138 has 24 divisors (see below), whose sum is σ = 1378227172608. Its totient is φ = 212030348472.

The previous prime is 636097947073. The next prime is 636097947161. The reversal of 636097947138 is 831749790636.

636097947138 is a `hidden beast` number, since 6 + 3 + 60 + 9 + 79 + 471 + 38 = 666.

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, 2658895 + ... + 2888237.

It is an arithmetic number, because the mean of its divisors is an integer number (57426132192).

Almost surely, 2^636097947138 is an apocalyptic number.

636097947138 is an abundant number, since it is smaller than the sum of its proper divisors (742129225470).

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

636097947138 is a wasteful number, since it uses less digits than its factorization.

636097947138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383438 (or 383435 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 63.

The spelling of 636097947138 in words is "six hundred thirty-six billion, ninety-seven million, nine hundred forty-seven thousand, one hundred thirty-eight".