68367351809 has 2 divisors, whose sum is σ = 68367351810. Its totient is φ = 68367351808.

The previous prime is 68367351751. The next prime is 68367351823. The reversal of 68367351809 is 90815376386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41228084209 + 27139267600 = 203047^2 + 164740^2 .

It is a cyclic number.

It is not a de Polignac number, because 68367351809 - 2⁸ = 68367351553 is a prime.

It is not a weakly prime, because it can be changed into another prime (68367351889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34183675904 + 34183675905.

It is an arithmetic number, because the mean of its divisors is an integer number (34183675905).

Almost surely, 2^68367351809 is an apocalyptic number.

It is an amenable number.

68367351809 is a deficient number, since it is larger than the sum of its proper divisors (1).

68367351809 is an equidigital number, since it uses as much as digits as its factorization.

68367351809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 68367351809 in words is "sixty-eight billion, three hundred sixty-seven million, three hundred fifty-one thousand, eight hundred nine".