68076810257 has 2 divisors, whose sum is σ = 68076810258. Its totient is φ = 68076810256.

The previous prime is 68076810203. The next prime is 68076810259. The reversal of 68076810257 is 75201867086.

68076810257 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., 36192779536 + 31884030721 = 190244^2 + 178561^2 .

It is a cyclic number.

It is not a de Polignac number, because 68076810257 - 2⁸ = 68076810001 is a prime.

Together with 68076810259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68076810259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34038405128 + 34038405129.

It is an arithmetic number, because the mean of its divisors is an integer number (34038405129).

Almost surely, 2^68076810257 is an apocalyptic number.

It is an amenable number.

68076810257 is a deficient number, since it is larger than the sum of its proper divisors (1).

68076810257 is an equidigital number, since it uses as much as digits as its factorization.

68076810257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 50.

The spelling of 68076810257 in words is "sixty-eight billion, seventy-six million, eight hundred ten thousand, two hundred fifty-seven".