4444621664464 has 80 divisors (see below), whose sum is σ = 9028832742720. Its totient is φ = 2116747422720.

The previous prime is 4444621664453. The next prime is 4444621664479. The reversal of 4444621664464 is 4644661264444.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26528284 + ... + 26695300.

It is an arithmetic number, because the mean of its divisors is an integer number (112860409284).

Almost surely, 2^{4444621664464} 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 4444621664464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4514416371360).

4444621664464 is an abundant number, since it is smaller than the sum of its proper divisors (4584211078256).

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

4444621664464 is a wasteful number, since it uses less digits than its factorization.

4444621664464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167828 (or 167822 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 55.

The spelling of 4444621664464 in words is "four trillion, four hundred forty-four billion, six hundred twenty-one million, six hundred sixty-four thousand, four hundred sixty-four".