138135345858 has 12 divisors (see below), whose sum is σ = 299293249398. Its totient is φ = 46045115280.

The previous prime is 138135345847. The next prime is 138135345863. The reversal of 138135345858 is 858543531831.

138135345858 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 3 + 53 + 4 + 585 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 110372121729 + 27763224129 = 332223^2 + 166623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3837092923 + ... + 3837092958.

Almost surely, 2^138135345858 is an apocalyptic number.

138135345858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

138135345858 is an abundant number, since it is smaller than the sum of its proper divisors (161157903540).

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

138135345858 is a wasteful number, since it uses less digits than its factorization.

138135345858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674185889 (or 7674185886 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 54.

The spelling of 138135345858 in words is "one hundred thirty-eight billion, one hundred thirty-five million, three hundred forty-five thousand, eight hundred fifty-eight".