2565446261 has 16 divisors (see below), whose sum is σ = 3090923520. Its totient is φ = 2082734640.

The previous prime is 2565446159. The next prime is 2565446333. The reversal of 2565446261 is 1626445652.

It is not a de Polignac number, because 2565446261 - 2¹⁰ = 2565445237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565146261) 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 15 ways as a sum of consecutive naturals, for example, 115571 + ... + 135968.

It is an arithmetic number, because the mean of its divisors is an integer number (193182720).

Almost surely, 2^2565446261 is an apocalyptic number.

It is an amenable number.

2565446261 is a deficient number, since it is larger than the sum of its proper divisors (525477259).

2565446261 is a wasteful number, since it uses less digits than its factorization.

2565446261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251624.

The product of its digits is 345600, while the sum is 41.

The square root of 2565446261 is about 50650.2345601676. The cubic root of 2565446261 is about 1368.9501718019.

The spelling of 2565446261 in words is "two billion, five hundred sixty-five million, four hundred forty-six thousand, two hundred sixty-one".