2604552565 has 4 divisors (see below), whose sum is σ = 3125463084. Its totient is φ = 2083642048.

The previous prime is 2604552551. The next prime is 2604552583. The reversal of 2604552565 is 5652554062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5652554062 = 2 ⋅2826277031.

It can be written as a sum of positive squares in 2 ways, for example, as 345736836 + 2258815729 = 18594^2 + 47527^2 .

It is a cyclic number.

It is not a de Polignac number, because 2604552565 - 2¹⁷ = 2604421493 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, 260455252 + ... + 260455261.

It is an arithmetic number, because the mean of its divisors is an integer number (781365771).

Almost surely, 2^2604552565 is an apocalyptic number.

It is an amenable number.

2604552565 is a deficient number, since it is larger than the sum of its proper divisors (520910519).

2604552565 is an equidigital number, since it uses as much as digits as its factorization.

2604552565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520910518.

The product of its (nonzero) digits is 360000, while the sum is 40.

The square root of 2604552565 is about 51034.8171839579. The cubic root of 2604552565 is about 1375.8709747881.

The spelling of 2604552565 in words is "two billion, six hundred four million, five hundred fifty-two thousand, five hundred sixty-five".