138017650279 has 2 divisors, whose sum is σ = 138017650280. Its totient is φ = 138017650278.

The previous prime is 138017650259. The next prime is 138017650319. The reversal of 138017650279 is 972056710831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138017650279 - 2⁵ = 138017650247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138017650229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69008825139 + 69008825140.

It is an arithmetic number, because the mean of its divisors is an integer number (69008825140).

Almost surely, 2^138017650279 is an apocalyptic number.

138017650279 is a deficient number, since it is larger than the sum of its proper divisors (1).

138017650279 is an equidigital number, since it uses as much as digits as its factorization.

138017650279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 138017650279 in words is "one hundred thirty-eight billion, seventeen million, six hundred fifty thousand, two hundred seventy-nine".