2044256721 has 96 divisors (see below), whose sum is σ = 3318174720. Its totient is φ = 1110181248.

The previous prime is 2044256707. The next prime is 2044256729. The reversal of 2044256721 is 1276524402.

It is not a de Polignac number, because 2044256721 - 2⁵ = 2044256689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2044256729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19105150 + ... + 19105256.

It is an arithmetic number, because the mean of its divisors is an integer number (34564320).

Almost surely, 2^2044256721 is an apocalyptic number.

It is an amenable number.

2044256721 is a deficient number, since it is larger than the sum of its proper divisors (1273917999).

2044256721 is a wasteful number, since it uses less digits than its factorization.

2044256721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 2044256721 is about 45213.4572997907. The cubic root of 2044256721 is about 1269.1466607199.

The spelling of 2044256721 in words is "two billion, forty-four million, two hundred fifty-six thousand, seven hundred twenty-one".