17123254356217 has 2 divisors, whose sum is σ = 17123254356218. Its totient is φ = 17123254356216.

The previous prime is 17123254356203. The next prime is 17123254356223. The reversal of 17123254356217 is 71265345232171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13330502001216 + 3792752355001 = 3651096^2 + 1947499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17123254356217 is a prime.

It is not a weakly prime, because it can be changed into another prime (17123254356017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8561627178108 + 8561627178109.

It is an arithmetic number, because the mean of its divisors is an integer number (8561627178109).

Almost surely, 2^{17123254356217} is an apocalyptic number.

It is an amenable number.

17123254356217 is a deficient number, since it is larger than the sum of its proper divisors (1).

17123254356217 is an equidigital number, since it uses as much as digits as its factorization.

17123254356217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 49.

Adding to 17123254356217 its reverse (71265345232171), we get a palindrome (88388599588388).

The spelling of 17123254356217 in words is "seventeen trillion, one hundred twenty-three billion, two hundred fifty-four million, three hundred fifty-six thousand, two hundred seventeen".