6644353252 has 24 divisors (see below), whose sum is σ = 12250982016. Its totient is φ = 3146877888.

The previous prime is 6644353237. The next prime is 6644353259. The reversal of 6644353252 is 2523534466.

It is not an unprimeable number, because it can be changed into a prime (6644353259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341113 + ... + 360064.

It is an arithmetic number, because the mean of its divisors is an integer number (510457584).

Almost surely, 2^6644353252 is an apocalyptic number.

It is an amenable number.

6644353252 is a deficient number, since it is larger than the sum of its proper divisors (5606628764).

6644353252 is a wasteful number, since it uses less digits than its factorization.

6644353252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701307 (or 701305 counting only the distinct ones).

The product of its digits is 518400, while the sum is 40.

The square root of 6644353252 is about 81512.9023652084. The cubic root of 6644353252 is about 1879.9699380284.

The spelling of 6644353252 in words is "six billion, six hundred forty-four million, three hundred fifty-three thousand, two hundred fifty-two".