68340674189 has 2 divisors, whose sum is σ = 68340674190. Its totient is φ = 68340674188.

The previous prime is 68340674147. The next prime is 68340674231. The reversal of 68340674189 is 98147604386.

It is a balanced prime because it is at equal distance from previous prime (68340674147) and next prime (68340674231).

It can be written as a sum of positive squares in only one way, i.e., 57716218564 + 10624455625 = 240242^2 + 103075^2 .

It is a cyclic number.

It is not a de Polignac number, because 68340674189 - 2¹² = 68340670093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68340674089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34170337094 + 34170337095.

It is an arithmetic number, because the mean of its divisors is an integer number (34170337095).

Almost surely, 2^68340674189 is an apocalyptic number.

It is an amenable number.

68340674189 is a deficient number, since it is larger than the sum of its proper divisors (1).

68340674189 is an equidigital number, since it uses as much as digits as its factorization.

68340674189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 56.

The spelling of 68340674189 in words is "sixty-eight billion, three hundred forty million, six hundred seventy-four thousand, one hundred eighty-nine".