68145507329 has 2 divisors, whose sum is σ = 68145507330. Its totient is φ = 68145507328.

The previous prime is 68145507319. The next prime is 68145507343. The reversal of 68145507329 is 92370554186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66977440000 + 1168067329 = 258800^2 + 34177^2 .

It is a cyclic number.

It is not a de Polignac number, because 68145507329 - 2²⁴ = 68128730113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68145507319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34072753664 + 34072753665.

It is an arithmetic number, because the mean of its divisors is an integer number (34072753665).

It is a 1-persistent number, because it is pandigital, but 2⋅68145507329 = 136291014658 is not.

Almost surely, 2^68145507329 is an apocalyptic number.

It is an amenable number.

68145507329 is a deficient number, since it is larger than the sum of its proper divisors (1).

68145507329 is an equidigital number, since it uses as much as digits as its factorization.

68145507329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 68145507329 in words is "sixty-eight billion, one hundred forty-five million, five hundred seven thousand, three hundred twenty-nine".