2565234566 has 8 divisors (see below), whose sum is σ = 3853856664. Its totient is φ = 1280615680.

The previous prime is 2565234559. The next prime is 2565234569. The reversal of 2565234566 is 6654325652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565234569) 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 in 3 ways as a sum of consecutive naturals, for example, 999200 + ... + 1001763.

It is an arithmetic number, because the mean of its divisors is an integer number (481732083).

Almost surely, 2^2565234566 is an apocalyptic number.

2565234566 is a deficient number, since it is larger than the sum of its proper divisors (1288622098).

2565234566 is a wasteful number, since it uses less digits than its factorization.

2565234566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001606.

The product of its digits is 1296000, while the sum is 44.

The square root of 2565234566 is about 50648.1447439094. The cubic root of 2565234566 is about 1368.9125165106.

The spelling of 2565234566 in words is "two billion, five hundred sixty-five million, two hundred thirty-four thousand, five hundred sixty-six".