68255705137 has 2 divisors, whose sum is σ = 68255705138. Its totient is φ = 68255705136.

The previous prime is 68255705131. The next prime is 68255705173. The reversal of 68255705137 is 73150755286.

Together with next prime (68255705173) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58564484001 + 9691221136 = 242001^2 + 98444^2 .

It is a cyclic number.

It is not a de Polignac number, because 68255705137 - 2⁷ = 68255705009 is a prime.

It is not a weakly prime, because it can be changed into another prime (68255705131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34127852568 + 34127852569.

It is an arithmetic number, because the mean of its divisors is an integer number (34127852569).

Almost surely, 2^68255705137 is an apocalyptic number.

It is an amenable number.

68255705137 is a deficient number, since it is larger than the sum of its proper divisors (1).

68255705137 is an equidigital number, since it uses as much as digits as its factorization.

68255705137 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 68255705137 in words is "sixty-eight billion, two hundred fifty-five million, seven hundred five thousand, one hundred thirty-seven".