268406304791 has 2 divisors, whose sum is σ = 268406304792. Its totient is φ = 268406304790.

The previous prime is 268406304773. The next prime is 268406304847. The reversal of 268406304791 is 197403604862.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268406304791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268406300791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134203152395 + 134203152396.

It is an arithmetic number, because the mean of its divisors is an integer number (134203152396).

Almost surely, 2^268406304791 is an apocalyptic number.

268406304791 is a deficient number, since it is larger than the sum of its proper divisors (1).

268406304791 is an equidigital number, since it uses as much as digits as its factorization.

268406304791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 268406304791 in words is "two hundred sixty-eight billion, four hundred six million, three hundred four thousand, seven hundred ninety-one".