138932327815 has 16 divisors (see below), whose sum is σ = 166975639200. Its totient is φ = 110974735872.

The previous prime is 138932327813. The next prime is 138932327893. The reversal of 138932327815 is 518723239831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138932327815 - 2¹ = 138932327813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138932327813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16870939 + ... + 16879171.

It is an arithmetic number, because the mean of its divisors is an integer number (10435977450).

Almost surely, 2^138932327815 is an apocalyptic number.

138932327815 is a deficient number, since it is larger than the sum of its proper divisors (28043311385).

138932327815 is an equidigital number, since it uses as much as digits as its factorization.

138932327815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13026.

The product of its digits is 2177280, while the sum is 52.

The spelling of 138932327815 in words is "one hundred thirty-eight billion, nine hundred thirty-two million, three hundred twenty-seven thousand, eight hundred fifteen".