4481549621 has 2 divisors, whose sum is σ = 4481549622. Its totient is φ = 4481549620.

The previous prime is 4481549581. The next prime is 4481549623. The reversal of 4481549621 is 1269451844.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3929534596 + 552015025 = 62686^2 + 23495^2 .

It is a cyclic number.

It is not a de Polignac number, because 4481549621 - 2¹⁸ = 4481287477 is a prime.

Together with 4481549623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4481549623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2240774810 + 2240774811.

It is an arithmetic number, because the mean of its divisors is an integer number (2240774811).

Almost surely, 2^4481549621 is an apocalyptic number.

It is an amenable number.

4481549621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4481549621 is an equidigital number, since it uses as much as digits as its factorization.

4481549621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 44.

The square root of 4481549621 is about 66944.3770678315. The cubic root of 4481549621 is about 1648.7041703412.

The spelling of 4481549621 in words is "four billion, four hundred eighty-one million, five hundred forty-nine thousand, six hundred twenty-one".