6644913228 has 72 divisors (see below), whose sum is σ = 16921064160. Its totient is φ = 2198649600.

The previous prime is 6644913211. The next prime is 6644913259. The reversal of 6644913228 is 8223194466.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4261513 + ... + 4263071.

It is an arithmetic number, because the mean of its divisors is an integer number (235014780).

Almost surely, 2^6644913228 is an apocalyptic number.

It is an amenable number.

6644913228 is an abundant number, since it is smaller than the sum of its proper divisors (10276150932).

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

6644913228 is a wasteful number, since it uses less digits than its factorization.

6644913228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367 (or 2362 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 6644913228 is about 81516.3371846405. The cubic root of 6644913228 is about 1880.0227502151.

The spelling of 6644913228 in words is "six billion, six hundred forty-four million, nine hundred thirteen thousand, two hundred twenty-eight".