6444317728 has 48 divisors (see below), whose sum is σ = 12778188696. Its totient is φ = 3199150080.

The previous prime is 6444317669. The next prime is 6444317731. The reversal of 6444317728 is 8277134446.

It can be written as a sum of positive squares in 4 ways, for example, as 2478844944 + 3965472784 = 49788^2 + 62972^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3137950 + ... + 3140002.

Almost surely, 2^6444317728 is an apocalyptic number.

It is an amenable number.

6444317728 is a deficient number, since it is larger than the sum of its proper divisors (6333870968).

6444317728 is a wasteful number, since it uses less digits than its factorization.

6444317728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717 (or 2709 counting only the distinct ones).

The product of its digits is 903168, while the sum is 46.

The square root of 6444317728 is about 80276.5079459738. The cubic root of 6444317728 is about 1860.9111934248.

The spelling of 6444317728 in words is "six billion, four hundred forty-four million, three hundred seventeen thousand, seven hundred twenty-eight".