138416576209 has 2 divisors, whose sum is σ = 138416576210. Its totient is φ = 138416576208.

The previous prime is 138416576171. The next prime is 138416576293. The reversal of 138416576209 is 902675614831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70593833025 + 67822743184 = 265695^2 + 260428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138416576209 is a prime.

It is not a weakly prime, because it can be changed into another prime (138416573209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69208288104 + 69208288105.

It is an arithmetic number, because the mean of its divisors is an integer number (69208288105).

It is a 1-persistent number, because it is pandigital, but 2⋅138416576209 = 276833152418 is not.

Almost surely, 2^138416576209 is an apocalyptic number.

It is an amenable number.

138416576209 is a deficient number, since it is larger than the sum of its proper divisors (1).

138416576209 is an equidigital number, since it uses as much as digits as its factorization.

138416576209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 138416576209 in words is "one hundred thirty-eight billion, four hundred sixteen million, five hundred seventy-six thousand, two hundred nine".