6644631016 has 64 divisors (see below), whose sum is σ = 13907220480. Its totient is φ = 2961546240.

The previous prime is 6644631001. The next prime is 6644631017. The reversal of 6644631016 is 6101364466.

It is a super-2 number, since 2×6644631016² = 88302242677578384512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6644631017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181386 + ... + 214918.

It is an arithmetic number, because the mean of its divisors is an integer number (217300320).

Almost surely, 2^6644631016 is an apocalyptic number.

It is an amenable number.

6644631016 is an abundant number, since it is smaller than the sum of its proper divisors (7262589464).

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

6644631016 is a wasteful number, since it uses less digits than its factorization.

6644631016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33634 (or 33630 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 6644631016 is about 81514.6061512905. The cubic root of 6644631016 is about 1879.9961347438.

The spelling of 6644631016 in words is "six billion, six hundred forty-four million, six hundred thirty-one thousand, sixteen".