2256323643645 has 16 divisors (see below), whose sum is σ = 3686928848640. Its totient is φ = 1177768937024.

The previous prime is 2256323643577. The next prime is 2256323643647. The reversal of 2256323643645 is 5463463236522.

It is a cyclic number.

It is not a de Polignac number, because 2256323643645 - 2⁸ = 2256323643389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256323643647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1600228830 + ... + 1600230239.

It is an arithmetic number, because the mean of its divisors is an integer number (230433053040).

Almost surely, 2^{2256323643645} is an apocalyptic number.

It is an amenable number.

2256323643645 is a deficient number, since it is larger than the sum of its proper divisors (1430605204995).

2256323643645 is a wasteful number, since it uses less digits than its factorization.

2256323643645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200459124.

The product of its digits is 18662400, while the sum is 51.

The spelling of 2256323643645 in words is "two trillion, two hundred fifty-six billion, three hundred twenty-three million, six hundred forty-three thousand, six hundred forty-five".