2565566525 has 6 divisors (see below), whose sum is σ = 3181302522. Its totient is φ = 2052453200.

The previous prime is 2565566473. The next prime is 2565566573. The reversal of 2565566525 is 5256655652.

It can be written as a sum of positive squares in 3 ways, for example, as 7027801 + 2558538724 = 2651^2 + 50582^2 .

It is not a de Polignac number, because 2565566525 - 2¹⁶ = 2565500989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2565566525.

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 51311306 + ... + 51311355.

It is an arithmetic number, because the mean of its divisors is an integer number (530217087).

Almost surely, 2^2565566525 is an apocalyptic number.

2565566525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2565566525 is a deficient number, since it is larger than the sum of its proper divisors (615735997).

2565566525 is a wasteful number, since it uses less digits than its factorization.

2565566525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102622671 (or 102622666 counting only the distinct ones).

The product of its digits is 2700000, while the sum is 47.

The square root of 2565566525 is about 50651.4217470744. The cubic root of 2565566525 is about 1368.9715628627.

The spelling of 2565566525 in words is "two billion, five hundred sixty-five million, five hundred sixty-six thousand, five hundred twenty-five".