138652818813 has 48 divisors (see below), whose sum is σ = 208081560960. Its totient is φ = 88915881600.

The previous prime is 138652818793. The next prime is 138652818847. The reversal of 138652818813 is 318818256831.

138652818813 is a `hidden beast` number, since 1 + 38 + 6 + 528 + 1 + 8 + 81 + 3 = 666.

It is not a de Polignac number, because 138652818813 - 2²⁰ = 138651770237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138652818813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138652818883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6118618 + ... + 6141236.

It is an arithmetic number, because the mean of its divisors is an integer number (4335032520).

Almost surely, 2^138652818813 is an apocalyptic number.

It is an amenable number.

138652818813 is a deficient number, since it is larger than the sum of its proper divisors (69428742147).

138652818813 is a wasteful number, since it uses less digits than its factorization.

138652818813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22930 (or 22927 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 54.

The spelling of 138652818813 in words is "one hundred thirty-eight billion, six hundred fifty-two million, eight hundred eighteen thousand, eight hundred thirteen".