2256555565 has 32 divisors (see below), whose sum is σ = 3072909312. Its totient is φ = 1575912000.

The previous prime is 2256555551. The next prime is 2256555589. The reversal of 2256555565 is 5655556522.

It is a happy number.

It is not a de Polignac number, because 2256555565 - 2⁵ = 2256555533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218304 + ... + 228406.

It is an arithmetic number, because the mean of its divisors is an integer number (96028416).

Almost surely, 2^2256555565 is an apocalyptic number.

It is an amenable number.

2256555565 is a deficient number, since it is larger than the sum of its proper divisors (816353747).

2256555565 is a wasteful number, since it uses less digits than its factorization.

2256555565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10281.

The product of its digits is 2250000, while the sum is 46.

The square root of 2256555565 is about 47503.2163647894. The cubic root of 2256555565 is about 1311.6420883607.

The spelling of 2256555565 in words is "two billion, two hundred fifty-six million, five hundred fifty-five thousand, five hundred sixty-five".