6644044140 has 48 divisors (see below), whose sum is σ = 18621858528. Its totient is φ = 1769979904.

The previous prime is 6644044139. The next prime is 6644044153. The reversal of 6644044140 is 414404466.

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 15 ways as a sum of consecutive naturals, for example, 6124 + ... + 115436.

It is an arithmetic number, because the mean of its divisors is an integer number (387955386).

Almost surely, 2^6644044140 is an apocalyptic number.

6644044140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6644044140 is an abundant number, since it is smaller than the sum of its proper divisors (11977814388).

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

6644044140 is a wasteful number, since it uses less digits than its factorization.

6644044140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110338 (or 110336 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

The square root of 6644044140 is about 81511.0062506899. The cubic root of 6644044140 is about 1879.9407839354.

The spelling of 6644044140 in words is "six billion, six hundred forty-four million, forty-four thousand, one hundred forty".