138136315217 has 16 divisors (see below), whose sum is σ = 146668680000. Its totient is φ = 129649559040.

The previous prime is 138136315211. The next prime is 138136315241. The reversal of 138136315217 is 712513631831.

It is a cyclic number.

It is not a de Polignac number, because 138136315217 - 2⁶ = 138136315153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138136315211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12371117 + ... + 12382277.

It is an arithmetic number, because the mean of its divisors is an integer number (9166792500).

Almost surely, 2^138136315217 is an apocalyptic number.

138136315217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

138136315217 is a deficient number, since it is larger than the sum of its proper divisors (8532364783).

138136315217 is a wasteful number, since it uses less digits than its factorization.

138136315217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13136.

The product of its digits is 90720, while the sum is 41.

The spelling of 138136315217 in words is "one hundred thirty-eight billion, one hundred thirty-six million, three hundred fifteen thousand, two hundred seventeen".