138157000815 has 64 divisors (see below), whose sum is σ = 232376841216. Its totient is φ = 70021573632.

The previous prime is 138157000811. The next prime is 138157000831. The reversal of 138157000815 is 518000751831.

It is a happy number.

It is not a de Polignac number, because 138157000815 - 2² = 138157000811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138157000811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4156492 + ... + 4189598.

It is an arithmetic number, because the mean of its divisors is an integer number (3630888144).

Almost surely, 2^138157000815 is an apocalyptic number.

138157000815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138157000815 is a deficient number, since it is larger than the sum of its proper divisors (94219840401).

138157000815 is a wasteful number, since it uses less digits than its factorization.

138157000815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33328.

The product of its (nonzero) digits is 33600, while the sum is 39.

The spelling of 138157000815 in words is "one hundred thirty-eight billion, one hundred fifty-seven million, eight hundred fifteen", and thus it is an aban number.