13638719208 has 64 divisors (see below), whose sum is σ = 34947803520. Its totient is φ = 4432896000.

The previous prime is 13638719207. The next prime is 13638719219. The reversal of 13638719208 is 80291783631.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13638719201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2838408 + ... + 2843208.

It is an arithmetic number, because the mean of its divisors is an integer number (546059430).

Almost surely, 2^13638719208 is an apocalyptic number.

It is an amenable number.

13638719208 is an abundant number, since it is smaller than the sum of its proper divisors (21309084312).

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

13638719208 is a wasteful number, since it uses less digits than its factorization.

13638719208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7738 (or 7734 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 13638719208 in words is "thirteen billion, six hundred thirty-eight million, seven hundred nineteen thousand, two hundred eight".