6604464220644 has 96 divisors (see below), whose sum is σ = 16845358924800. Its totient is φ = 2004900986880.

The previous prime is 6604464220639. The next prime is 6604464220657. The reversal of 6604464220644 is 4460224644066.

It is a junction number, because it is equal to n+sod(n) for n = 6604464220593 and 6604464220602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54382662 + ... + 54503970.

It is an arithmetic number, because the mean of its divisors is an integer number (175472488800).

Almost surely, 2^{6604464220644} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6604464220644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8422679462400).

6604464220644 is an abundant number, since it is smaller than the sum of its proper divisors (10240894704156).

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

6604464220644 is a wasteful number, since it uses less digits than its factorization.

6604464220644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129973 (or 129971 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 6604464220644 in words is "six trillion, six hundred four billion, four hundred sixty-four million, two hundred twenty thousand, six hundred forty-four".