2565444485 has 4 divisors (see below), whose sum is σ = 3078533388. Its totient is φ = 2052355584.

The previous prime is 2565444439. The next prime is 2565444493. The reversal of 2565444485 is 5844445652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 325694209 + 2239750276 = 18047^2 + 47326^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565444485 - 2⁸ = 2565444229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256544444 + ... + 256544453.

It is an arithmetic number, because the mean of its divisors is an integer number (769633347).

Almost surely, 2^2565444485 is an apocalyptic number.

It is an amenable number.

2565444485 is a deficient number, since it is larger than the sum of its proper divisors (513088903).

2565444485 is an equidigital number, since it uses as much as digits as its factorization.

2565444485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513088902.

The product of its digits is 3072000, while the sum is 47.

The square root of 2565444485 is about 50650.2170281629. The cubic root of 2565444485 is about 1368.9498559041.

The spelling of 2565444485 in words is "two billion, five hundred sixty-five million, four hundred forty-four thousand, four hundred eighty-five".