6644088980 has 48 divisors (see below), whose sum is σ = 14055204240. Its totient is φ = 2638153728.

The previous prime is 6644088977. The next prime is 6644088989. The reversal of 6644088980 is 898804466.

It can be written as a sum of positive squares in 8 ways, for example, as 2581046416 + 4063042564 = 50804^2 + 63742^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644088989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2003804 + ... + 2007116.

It is an arithmetic number, because the mean of its divisors is an integer number (292816755).

Almost surely, 2^6644088980 is an apocalyptic number.

It is an amenable number.

6644088980 is an abundant number, since it is smaller than the sum of its proper divisors (7411115260).

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

6644088980 is a wasteful number, since it uses less digits than its factorization.

6644088980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028 (or 4026 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 53.

The square root of 6644088980 is about 81511.2813051052. The cubic root of 6644088980 is about 1879.9450131043.

The spelling of 6644088980 in words is "six billion, six hundred forty-four million, eighty-eight thousand, nine hundred eighty".