68508443512321 has 2 divisors, whose sum is σ = 68508443512322. Its totient is φ = 68508443512320.

The previous prime is 68508443512279. The next prime is 68508443512337. The reversal of 68508443512321 is 12321534480586.

68508443512321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67208925591025 + 1299517921296 = 8198105^2 + 1139964^2 .

It is a cyclic number.

It is not a de Polignac number, because 68508443512321 - 2¹⁹ = 68508442988033 is a prime.

It is not a weakly prime, because it can be changed into another prime (68508447512321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34254221756160 + 34254221756161.

It is an arithmetic number, because the mean of its divisors is an integer number (34254221756161).

Almost surely, 2^{68508443512321} is an apocalyptic number.

It is an amenable number.

68508443512321 is a deficient number, since it is larger than the sum of its proper divisors (1).

68508443512321 is an equidigital number, since it uses as much as digits as its factorization.

68508443512321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5529600, while the sum is 52.

The spelling of 68508443512321 in words is "sixty-eight trillion, five hundred eight billion, four hundred forty-three million, five hundred twelve thousand, three hundred twenty-one".