13638668109718 has 64 divisors (see below), whose sum is σ = 21438097084800. Its totient is φ = 6501625574400.

The previous prime is 13638668109673. The next prime is 13638668109721. The reversal of 13638668109718 is 81790186683631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 748668946 + ... + 748687162.

It is an arithmetic number, because the mean of its divisors is an integer number (334970266950).

Almost surely, 2^{13638668109718} is an apocalyptic number.

13638668109718 is a deficient number, since it is larger than the sum of its proper divisors (7799428975082).

13638668109718 is a wasteful number, since it uses less digits than its factorization.

13638668109718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19385.

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 13638668109718 in words is "thirteen trillion, six hundred thirty-eight billion, six hundred sixty-eight million, one hundred nine thousand, seven hundred eighteen".