1044644057 has 4 divisors (see below), whose sum is σ = 1044725376. Its totient is φ = 1044562740.

The previous prime is 1044644053. The next prime is 1044644063. The reversal of 1044644057 is 7504464401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1044644057 - 2² = 1044644053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1044644053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16673 + ... + 48654.

It is an arithmetic number, because the mean of its divisors is an integer number (261181344).

Almost surely, 2^1044644057 is an apocalyptic number.

It is an amenable number.

1044644057 is a deficient number, since it is larger than the sum of its proper divisors (81319).

1044644057 is an equidigital number, since it uses as much as digits as its factorization.

1044644057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81318.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 1044644057 is about 32320.9538380290. The cubic root of 1044644057 is about 1014.6652319592.

The spelling of 1044644057 in words is "one billion, forty-four million, six hundred forty-four thousand, fifty-seven".