2565122559 has 16 divisors (see below), whose sum is σ = 3612601344. Its totient is φ = 1616428800.

The previous prime is 2565122519. The next prime is 2565122561. The reversal of 2565122559 is 9552215652.

It is a happy number.

It is not a de Polignac number, because 2565122559 - 2⁹ = 2565122047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2565122559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565122519) 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 in 15 ways as a sum of consecutive naturals, for example, 316722 + ... + 324719.

It is an arithmetic number, because the mean of its divisors is an integer number (225787584).

Almost surely, 2^2565122559 is an apocalyptic number.

2565122559 is a deficient number, since it is larger than the sum of its proper divisors (1047478785).

2565122559 is a wasteful number, since it uses less digits than its factorization.

2565122559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641518.

The product of its digits is 270000, while the sum is 42.

The square root of 2565122559 is about 50647.0389953845. The cubic root of 2565122559 is about 1368.8925924047.

The spelling of 2565122559 in words is "two billion, five hundred sixty-five million, one hundred twenty-two thousand, five hundred fifty-nine".