2556707565 has 16 divisors (see below), whose sum is σ = 4091976000. Its totient is φ = 1363162752.

The previous prime is 2556707497. The next prime is 2556707581. The reversal of 2556707565 is 5657076552.

It is not a de Polignac number, because 2556707565 - 2¹⁰ = 2556706541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28786 + ... + 77084.

It is an arithmetic number, because the mean of its divisors is an integer number (255748500).

Almost surely, 2^2556707565 is an apocalyptic number.

It is an amenable number.

2556707565 is a deficient number, since it is larger than the sum of its proper divisors (1535268435).

2556707565 is a wasteful number, since it uses less digits than its factorization.

2556707565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51836.

The product of its (nonzero) digits is 2205000, while the sum is 48.

The square root of 2556707565 is about 50563.8958645396. The cubic root of 2556707565 is about 1367.3940490111.

The spelling of 2556707565 in words is "two billion, five hundred fifty-six million, seven hundred seven thousand, five hundred sixty-five".