635643040566136 has 32 divisors (see below), whose sum is σ = 1220903293387680. Its totient is φ = 310068874086400.

The previous prime is 635643040566113. The next prime is 635643040566221. The reversal of 635643040566136 is 631665040346536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118017645 + ... + 123286051.

It is an arithmetic number, because the mean of its divisors is an integer number (38153227918365).

Almost surely, 2^{635643040566136} is an apocalyptic number.

It is an amenable number.

635643040566136 is a deficient number, since it is larger than the sum of its proper divisors (585260252821544).

635643040566136 is a wasteful number, since it uses less digits than its factorization.

635643040566136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636295 (or 5636291 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 58.

The spelling of 635643040566136 in words is "six hundred thirty-five trillion, six hundred forty-three billion, forty million, five hundred sixty-six thousand, one hundred thirty-six".