680811078391 has 2 divisors, whose sum is σ = 680811078392. Its totient is φ = 680811078390.

The previous prime is 680811078331. The next prime is 680811078427. The reversal of 680811078391 is 193870118086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680811078391 - 2⁷ = 680811078263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680811078331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340405539195 + 340405539196.

It is an arithmetic number, because the mean of its divisors is an integer number (340405539196).

Almost surely, 2^680811078391 is an apocalyptic number.

680811078391 is a deficient number, since it is larger than the sum of its proper divisors (1).

680811078391 is an equidigital number, since it uses as much as digits as its factorization.

680811078391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 52.

The spelling of 680811078391 in words is "six hundred eighty billion, eight hundred eleven million, seventy-eight thousand, three hundred ninety-one".