635668666866536 has 32 divisors (see below), whose sum is σ = 1245604159359360. Its totient is φ = 303549882009792.

The previous prime is 635668666866509. The next prime is 635668666866557.

635668666866536 is nontrivially palindromic in base 10.

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, 2645148620 + ... + 2645388923.

It is an arithmetic number, because the mean of its divisors is an integer number (38925129979980).

Almost surely, 2^{635668666866536} is an apocalyptic number.

It is an amenable number.

635668666866536 is a deficient number, since it is larger than the sum of its proper divisors (609935492492824).

635668666866536 is a wasteful number, since it uses less digits than its factorization.

635668666866536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5290538225 (or 5290538221 counting only the distinct ones).

The product of its digits is 145118822400, while the sum is 86.

The spelling of 635668666866536 in words is "six hundred thirty-five trillion, six hundred sixty-eight billion, six hundred sixty-six million, eight hundred sixty-six thousand, five hundred thirty-six".