245591813791 has 2 divisors, whose sum is σ = 245591813792. Its totient is φ = 245591813790.

The previous prime is 245591813783. The next prime is 245591813807. The reversal of 245591813791 is 197318195542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245591813791 - 2³ = 245591813783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245591813711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122795906895 + 122795906896.

It is an arithmetic number, because the mean of its divisors is an integer number (122795906896).

Almost surely, 2^245591813791 is an apocalyptic number.

245591813791 is a deficient number, since it is larger than the sum of its proper divisors (1).

245591813791 is an equidigital number, since it uses as much as digits as its factorization.

245591813791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 55.

The spelling of 245591813791 in words is "two hundred forty-five billion, five hundred ninety-one million, eight hundred thirteen thousand, seven hundred ninety-one".