138131582706 has 72 divisors (see below), whose sum is σ = 342381680004. Its totient is φ = 40001886720.

The previous prime is 138131582683. The next prime is 138131582773. The reversal of 138131582706 is 607285131831.

It is a happy number.

138131582706 is a `hidden beast` number, since 1 + 38 + 1 + 31 + 582 + 7 + 0 + 6 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 56315561481 + 81816021225 = 237309^2 + 286035^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 953665 + ... + 1088916.

Almost surely, 2^138131582706 is an apocalyptic number.

138131582706 is an abundant number, since it is smaller than the sum of its proper divisors (204250097298).

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

138131582706 is a wasteful number, since it uses less digits than its factorization.

138131582706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2042636 (or 2042616 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 138131582706 in words is "one hundred thirty-eight billion, one hundred thirty-one million, five hundred eighty-two thousand, seven hundred six".