68940175771 has 2 divisors, whose sum is σ = 68940175772. Its totient is φ = 68940175770.

The previous prime is 68940175739. The next prime is 68940175831. The reversal of 68940175771 is 17757104986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68940175771 - 2⁵ = 68940175739 is a prime.

It is not a weakly prime, because it can be changed into another prime (68944175771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34470087885 + 34470087886.

It is an arithmetic number, because the mean of its divisors is an integer number (34470087886).

Almost surely, 2^68940175771 is an apocalyptic number.

68940175771 is a deficient number, since it is larger than the sum of its proper divisors (1).

68940175771 is an equidigital number, since it uses as much as digits as its factorization.

68940175771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 55.

The spelling of 68940175771 in words is "sixty-eight billion, nine hundred forty million, one hundred seventy-five thousand, seven hundred seventy-one".