13668623638 has 8 divisors (see below), whose sum is σ = 20512756440. Its totient is φ = 6831038160.

The previous prime is 13668623597. The next prime is 13668623651. The reversal of 13668623638 is 83632686631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 1631608 + ... + 1639963.

It is an arithmetic number, because the mean of its divisors is an integer number (2564094555).

Almost surely, 2^13668623638 is an apocalyptic number.

13668623638 is a deficient number, since it is larger than the sum of its proper divisors (6844132802).

13668623638 is a wasteful number, since it uses less digits than its factorization.

13668623638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273662.

The product of its digits is 4478976, while the sum is 52.

The spelling of 13668623638 in words is "thirteen billion, six hundred sixty-eight million, six hundred twenty-three thousand, six hundred thirty-eight".