17668258121 has 2 divisors, whose sum is σ = 17668258122. Its totient is φ = 17668258120.

The previous prime is 17668258081. The next prime is 17668258129. The reversal of 17668258121 is 12185286671.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14163618121 + 3504640000 = 119011^2 + 59200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17668258121 is a prime.

It is not a weakly prime, because it can be changed into another prime (17668258129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8834129060 + 8834129061.

It is an arithmetic number, because the mean of its divisors is an integer number (8834129061).

Almost surely, 2^17668258121 is an apocalyptic number.

It is an amenable number.

17668258121 is a deficient number, since it is larger than the sum of its proper divisors (1).

17668258121 is an equidigital number, since it uses as much as digits as its factorization.

17668258121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 47.

The spelling of 17668258121 in words is "seventeen billion, six hundred sixty-eight million, two hundred fifty-eight thousand, one hundred twenty-one".