4421661244 has 72 divisors (see below), whose sum is σ = 10446565248. Its totient is φ = 1590189120.

The previous prime is 4421661229. The next prime is 4421661281.

4421661244 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9579 + ... + 94525.

It is an arithmetic number, because the mean of its divisors is an integer number (145091184).

Almost surely, 2^4421661244 is an apocalyptic number.

4421661244 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4421661244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5223282624).

4421661244 is an abundant number, since it is smaller than the sum of its proper divisors (6024904004).

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

4421661244 is a wasteful number, since it uses less digits than its factorization.

4421661244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84995 (or 84980 counting only the distinct ones).

The product of its digits is 36864, while the sum is 34.

The square root of 4421661244 is about 66495.5731158097. The cubic root of 4421661244 is about 1641.3271584155.

The spelling of 4421661244 in words is "four billion, four hundred twenty-one million, six hundred sixty-one thousand, two hundred forty-four".