138926885771 has 16 divisors (see below), whose sum is σ = 142201925568. Its totient is φ = 135689702400.

The previous prime is 138926885759. The next prime is 138926885807. The reversal of 138926885771 is 177588629831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138926885771 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138926885698 and 138926885707.

It is not an unprimeable number, because it can be changed into a prime (138926885731) 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, 24555575 + ... + 24561231.

It is an arithmetic number, because the mean of its divisors is an integer number (8887620348).

Almost surely, 2^138926885771 is an apocalyptic number.

138926885771 is a deficient number, since it is larger than the sum of its proper divisors (3275039797).

138926885771 is a wasteful number, since it uses less digits than its factorization.

138926885771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8902.

The product of its digits is 40642560, while the sum is 65.

The spelling of 138926885771 in words is "one hundred thirty-eight billion, nine hundred twenty-six million, eight hundred eighty-five thousand, seven hundred seventy-one".