168697445556617 has 2 divisors, whose sum is σ = 168697445556618. Its totient is φ = 168697445556616.

The previous prime is 168697445556557. The next prime is 168697445556659. The reversal of 168697445556617 is 716655544796861.

It is a happy number.

168697445556617 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 can be written as a sum of positive squares in only one way, i.e., 137357837440576 + 31339608116041 = 11719976^2 + 5598179^2 .

It is a cyclic number.

It is not a de Polignac number, because 168697445556617 - 2³² = 168693150589321 is a prime.

It is not a weakly prime, because it can be changed into another prime (168697445556667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84348722778308 + 84348722778309.

It is an arithmetic number, because the mean of its divisors is an integer number (84348722778309).

Almost surely, 2^{168697445556617} is an apocalyptic number.

It is an amenable number.

168697445556617 is a deficient number, since it is larger than the sum of its proper divisors (1).

168697445556617 is an equidigital number, since it uses as much as digits as its factorization.

168697445556617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576000, while the sum is 80.

The spelling of 168697445556617 in words is "one hundred sixty-eight trillion, six hundred ninety-seven billion, four hundred forty-five million, five hundred fifty-six thousand, six hundred seventeen".