2256323566565 has 16 divisors (see below), whose sum is σ = 2783754950400. Its totient is φ = 1754796584640.

The previous prime is 2256323566507. The next prime is 2256323566589. The reversal of 2256323566565 is 5656653236522.

It is not a de Polignac number, because 2256323566565 - 2¹⁰ = 2256323565541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2256323566565.

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, 32184371 + ... + 32254400.

It is an arithmetic number, because the mean of its divisors is an integer number (173984684400).

Almost surely, 2^{2256323566565} is an apocalyptic number.

It is an amenable number.

2256323566565 is a deficient number, since it is larger than the sum of its proper divisors (527431383835).

2256323566565 is a wasteful number, since it uses less digits than its factorization.

2256323566565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64438972.

The product of its digits is 58320000, while the sum is 56.

The spelling of 2256323566565 in words is "two trillion, two hundred fifty-six billion, three hundred twenty-three million, five hundred sixty-six thousand, five hundred sixty-five".