138515845129 has 2 divisors, whose sum is σ = 138515845130. Its totient is φ = 138515845128.

The previous prime is 138515845087. The next prime is 138515845133. The reversal of 138515845129 is 921548515831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133751118400 + 4764726729 = 365720^2 + 69027^2 .

It is a cyclic number.

It is not a de Polignac number, because 138515845129 - 2¹⁵ = 138515812361 is a prime.

It is a super-2 number, since 2×138515845129² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138515845199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69257922564 + 69257922565.

It is an arithmetic number, because the mean of its divisors is an integer number (69257922565).

Almost surely, 2^138515845129 is an apocalyptic number.

It is an amenable number.

138515845129 is a deficient number, since it is larger than the sum of its proper divisors (1).

138515845129 is an equidigital number, since it uses as much as digits as its factorization.

138515845129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728000, while the sum is 52.

The spelling of 138515845129 in words is "one hundred thirty-eight billion, five hundred fifteen million, eight hundred forty-five thousand, one hundred twenty-nine".