138529627290 has 24 divisors (see below), whose sum is σ = 360177031188. Its totient is φ = 36941233920.

The previous prime is 138529627273. The next prime is 138529627321. The reversal of 138529627290 is 92726925831.

138529627290 is a `hidden beast` number, since 1 + 3 + 8 + 5 + 2 + 9 + 627 + 2 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127082981169 + 11446646121 = 356487^2 + 106989^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 769608951 + ... + 769609130.

Almost surely, 2^138529627290 is an apocalyptic number.

138529627290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138529627290 is an abundant number, since it is smaller than the sum of its proper divisors (221647403898).

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

138529627290 is a wasteful number, since it uses less digits than its factorization.

138529627290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539218094 (or 1539218091 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 138529627290 in words is "one hundred thirty-eight billion, five hundred twenty-nine million, six hundred twenty-seven thousand, two hundred ninety".