68645326213 has 2 divisors, whose sum is σ = 68645326214. Its totient is φ = 68645326212.

The previous prime is 68645326193. The next prime is 68645326231. The reversal of 68645326213 is 31262354686.

Together with next prime (68645326231) 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., 67848788484 + 796537729 = 260478^2 + 28223^2 .

It is a cyclic number.

It is not a de Polignac number, because 68645326213 - 2⁵ = 68645326181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68645386213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34322663106 + 34322663107.

It is an arithmetic number, because the mean of its divisors is an integer number (34322663107).

Almost surely, 2^68645326213 is an apocalyptic number.

It is an amenable number.

68645326213 is a deficient number, since it is larger than the sum of its proper divisors (1).

68645326213 is an equidigital number, since it uses as much as digits as its factorization.

68645326213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 46.

The spelling of 68645326213 in words is "sixty-eight billion, six hundred forty-five million, three hundred twenty-six thousand, two hundred thirteen".