138775002689 has 2 divisors, whose sum is σ = 138775002690. Its totient is φ = 138775002688.

The previous prime is 138775002679. The next prime is 138775002763. The reversal of 138775002689 is 986200577831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100975866289 + 37799136400 = 317767^2 + 194420^2 .

It is a cyclic number.

It is not a de Polignac number, because 138775002689 - 2⁴ = 138775002673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (138775002679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69387501344 + 69387501345.

It is an arithmetic number, because the mean of its divisors is an integer number (69387501345).

Almost surely, 2^138775002689 is an apocalyptic number.

It is an amenable number.

138775002689 is a deficient number, since it is larger than the sum of its proper divisors (1).

138775002689 is an equidigital number, since it uses as much as digits as its factorization.

138775002689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 138775002689 in words is "one hundred thirty-eight billion, seven hundred seventy-five million, two thousand, six hundred eighty-nine".