2564869192243 has 2 divisors, whose sum is σ = 2564869192244. Its totient is φ = 2564869192242.

The previous prime is 2564869192147. The next prime is 2564869192247. The reversal of 2564869192243 is 3422919684652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2564869192243 - 2³⁷ = 2427430238771 is a prime.

It is not a weakly prime, because it can be changed into another prime (2564869192247) 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, 1282434596121 + 1282434596122.

It is an arithmetic number, because the mean of its divisors is an integer number (1282434596122).

Almost surely, 2^{2564869192243} is an apocalyptic number.

2564869192243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564869192243 is an equidigital number, since it uses as much as digits as its factorization.

2564869192243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 61.

The spelling of 2564869192243 in words is "two trillion, five hundred sixty-four billion, eight hundred sixty-nine million, one hundred ninety-two thousand, two hundred forty-three".