138855165786 has 40 divisors (see below), whose sum is σ = 318374220384. Its totient is φ = 45208656360.

The previous prime is 138855165767. The next prime is 138855165791. The reversal of 138855165786 is 687561558831.

138855165786 is a `hidden beast` number, since 1 + 3 + 8 + 8 + 5 + 51 + 6 + 578 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9959670 + ... + 9973601.

Almost surely, 2^138855165786 is an apocalyptic number.

138855165786 is an abundant number, since it is smaller than the sum of its proper divisors (179519054598).

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

138855165786 is a wasteful number, since it uses less digits than its factorization.

138855165786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19933328 (or 19933319 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 63.

The spelling of 138855165786 in words is "one hundred thirty-eight billion, eight hundred fifty-five million, one hundred sixty-five thousand, seven hundred eighty-six".