263425566791 has 2 divisors, whose sum is σ = 263425566792. Its totient is φ = 263425566790.

The previous prime is 263425566751. The next prime is 263425566797. The reversal of 263425566791 is 197665524362.

263425566791 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 is a cyclic number.

It is not a de Polignac number, because 263425566791 - 2¹⁸ = 263425304647 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263425566797) 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, 131712783395 + 131712783396.

It is an arithmetic number, because the mean of its divisors is an integer number (131712783396).

Almost surely, 2^263425566791 is an apocalyptic number.

263425566791 is a deficient number, since it is larger than the sum of its proper divisors (1).

263425566791 is an equidigital number, since it uses as much as digits as its factorization.

263425566791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 56.

The spelling of 263425566791 in words is "two hundred sixty-three billion, four hundred twenty-five million, five hundred sixty-six thousand, seven hundred ninety-one".