138775002617 has 2 divisors, whose sum is σ = 138775002618. Its totient is φ = 138775002616.

The previous prime is 138775002577. The next prime is 138775002643. The reversal of 138775002617 is 716200577831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131790054841 + 6984947776 = 363029^2 + 83576^2 .

It is a cyclic number.

It is not a de Polignac number, because 138775002617 - 2²² = 138770808313 is a prime.

It is not a weakly prime, because it can be changed into another prime (138775002517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69387501308 + 69387501309.

It is an arithmetic number, because the mean of its divisors is an integer number (69387501309).

Almost surely, 2^138775002617 is an apocalyptic number.

It is an amenable number.

138775002617 is a deficient number, since it is larger than the sum of its proper divisors (1).

138775002617 is an equidigital number, since it uses as much as digits as its factorization.

138775002617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 138775002617 in words is "one hundred thirty-eight billion, seven hundred seventy-five million, two thousand, six hundred seventeen".