68557160173 has 2 divisors, whose sum is σ = 68557160174. Its totient is φ = 68557160172.

The previous prime is 68557160129. The next prime is 68557160183. The reversal of 68557160173 is 37106175586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51174583524 + 17382576649 = 226218^2 + 131843^2 .

It is a cyclic number.

It is not a de Polignac number, because 68557160173 - 2⁹ = 68557159661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68557160183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34278580086 + 34278580087.

It is an arithmetic number, because the mean of its divisors is an integer number (34278580087).

Almost surely, 2^68557160173 is an apocalyptic number.

It is an amenable number.

68557160173 is a deficient number, since it is larger than the sum of its proper divisors (1).

68557160173 is an equidigital number, since it uses as much as digits as its factorization.

68557160173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 68557160173 in words is "sixty-eight billion, five hundred fifty-seven million, one hundred sixty thousand, one hundred seventy-three".