13538639768 has 16 divisors (see below), whose sum is σ = 25386210000. Its totient is φ = 6768983776.

The previous prime is 13538639717. The next prime is 13538639783. The reversal of 13538639768 is 86793683531.

It is a happy number.

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, 242558 + ... + 293106.

It is an arithmetic number, because the mean of its divisors is an integer number (1586638125).

Almost surely, 2^13538639768 is an apocalyptic number.

It is an amenable number.

13538639768 is a deficient number, since it is larger than the sum of its proper divisors (11847570232).

13538639768 is a wasteful number, since it uses less digits than its factorization.

13538639768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84034 (or 84030 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 59.

It can be divided in two parts, 1353863 and 9768, that added together give a palindrome (1363631).

The spelling of 13538639768 in words is "thirteen billion, five hundred thirty-eight million, six hundred thirty-nine thousand, seven hundred sixty-eight".