2044643957 has 4 divisors (see below), whose sum is σ = 2044738080. Its totient is φ = 2044549836.

The previous prime is 2044643947. The next prime is 2044643963. The reversal of 2044643957 is 7593464402.

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 2044643957 - 2⁸ = 2044643701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2044643947) 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, 3968 + ... + 64070.

It is an arithmetic number, because the mean of its divisors is an integer number (511184520).

Almost surely, 2^2044643957 is an apocalyptic number.

It is an amenable number.

2044643957 is a deficient number, since it is larger than the sum of its proper divisors (94123).

2044643957 is an equidigital number, since it uses as much as digits as its factorization.

2044643957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94122.

The product of its (nonzero) digits is 725760, while the sum is 44.

The square root of 2044643957 is about 45217.7394061225. The cubic root of 2044643957 is about 1269.2267922485.

It can be divided in two parts, 204464395 and 7, that added together give a palindrome (204464402).

The spelling of 2044643957 in words is "two billion, forty-four million, six hundred forty-three thousand, nine hundred fifty-seven".