4256944566 has 64 divisors (see below), whose sum is σ = 10343877120. Its totient is φ = 1140825600.

The previous prime is 4256944561. The next prime is 4256944567. The reversal of 4256944566 is 6654496524.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4256944561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54190 + ... + 107006.

It is an arithmetic number, because the mean of its divisors is an integer number (161623080).

Almost surely, 2^4256944566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4256944566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5171938560).

4256944566 is an abundant number, since it is smaller than the sum of its proper divisors (6086932554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4256944566 is a wasteful number, since it uses less digits than its factorization.

4256944566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52949.

The product of its digits is 6220800, while the sum is 51.

The square root of 4256944566 is about 65245.2647017391. The cubic root of 4256944566 is about 1620.6876831963.

The spelling of 4256944566 in words is "four billion, two hundred fifty-six million, nine hundred forty-four thousand, five hundred sixty-six".