2565245399 has 2 divisors, whose sum is σ = 2565245400. Its totient is φ = 2565245398.

The previous prime is 2565245363. The next prime is 2565245429. The reversal of 2565245399 is 9935425652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2565245399 - 2²⁸ = 2296809943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565245339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282622699 + 1282622700.

It is an arithmetic number, because the mean of its divisors is an integer number (1282622700).

Almost surely, 2^2565245399 is an apocalyptic number.

2565245399 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565245399 is an equidigital number, since it uses as much as digits as its factorization.

2565245399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916000, while the sum is 50.

The square root of 2565245399 is about 50648.2516874966. The cubic root of 2565245399 is about 1368.9144434830.

The spelling of 2565245399 in words is "two billion, five hundred sixty-five million, two hundred forty-five thousand, three hundred ninety-nine".