68255705173 has 2 divisors, whose sum is σ = 68255705174. Its totient is φ = 68255705172.

The previous prime is 68255705137. The next prime is 68255705191. The reversal of 68255705173 is 37150755286.

Together with previous prime (68255705137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54080897809 + 14174807364 = 232553^2 + 119058^2 .

It is a cyclic number.

It is not a de Polignac number, because 68255705173 - 2¹³ = 68255696981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68255705123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34127852586 + 34127852587.

It is an arithmetic number, because the mean of its divisors is an integer number (34127852587).

Almost surely, 2^68255705173 is an apocalyptic number.

It is an amenable number.

68255705173 is a deficient number, since it is larger than the sum of its proper divisors (1).

68255705173 is an equidigital number, since it uses as much as digits as its factorization.

68255705173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 68255705173 in words is "sixty-eight billion, two hundred fifty-five million, seven hundred five thousand, one hundred seventy-three".