138120667169 has 2 divisors, whose sum is σ = 138120667170. Its totient is φ = 138120667168.

The previous prime is 138120667141. The next prime is 138120667207. The reversal of 138120667169 is 961766021831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114658086544 + 23462580625 = 338612^2 + 153175^2 .

It is a cyclic number.

It is not a de Polignac number, because 138120667169 - 2³² = 133825699873 is a prime.

It is a super-2 number, since 2×138120667169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138120660169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69060333584 + 69060333585.

It is an arithmetic number, because the mean of its divisors is an integer number (69060333585).

Almost surely, 2^138120667169 is an apocalyptic number.

It is an amenable number.

138120667169 is a deficient number, since it is larger than the sum of its proper divisors (1).

138120667169 is an equidigital number, since it uses as much as digits as its factorization.

138120667169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 138120667169 in words is "one hundred thirty-eight billion, one hundred twenty million, six hundred sixty-seven thousand, one hundred sixty-nine".