138926885736 has 32 divisors (see below), whose sum is σ = 352501057440. Its totient is φ = 45617782848.

The previous prime is 138926885731. The next prime is 138926885759. The reversal of 138926885736 is 637588629831.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (138926885731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43197051 + ... + 43200266.

It is an arithmetic number, because the mean of its divisors is an integer number (11015658045).

Almost surely, 2^138926885736 is an apocalyptic number.

It is an amenable number.

138926885736 is an abundant number, since it is smaller than the sum of its proper divisors (213574171704).

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

138926885736 is a wasteful number, since it uses less digits than its factorization.

138926885736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86397393 (or 86397389 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 66.

The spelling of 138926885736 in words is "one hundred thirty-eight billion, nine hundred twenty-six million, eight hundred eighty-five thousand, seven hundred thirty-six".