138636187259 has 2 divisors, whose sum is σ = 138636187260. Its totient is φ = 138636187258.

The previous prime is 138636187147. The next prime is 138636187267. The reversal of 138636187259 is 952781636831.

It is a happy number.

138636187259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138636187259 - 2²⁴ = 138619410043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138636187198 and 138636187207.

It is not a weakly prime, because it can be changed into another prime (138636187279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69318093629 + 69318093630.

It is an arithmetic number, because the mean of its divisors is an integer number (69318093630).

Almost surely, 2^138636187259 is an apocalyptic number.

138636187259 is a deficient number, since it is larger than the sum of its proper divisors (1).

138636187259 is an equidigital number, since it uses as much as digits as its factorization.

138636187259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 59.

The spelling of 138636187259 in words is "one hundred thirty-eight billion, six hundred thirty-six million, one hundred eighty-seven thousand, two hundred fifty-nine".