4441065521 has 2 divisors, whose sum is σ = 4441065522. Its totient is φ = 4441065520.

The previous prime is 4441065509. The next prime is 4441065571. The reversal of 4441065521 is 1255601444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3664607296 + 776458225 = 60536^2 + 27865^2 .

It is a cyclic number.

It is not a de Polignac number, because 4441065521 - 2⁶ = 4441065457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4441065571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2220532760 + 2220532761.

It is an arithmetic number, because the mean of its divisors is an integer number (2220532761).

Almost surely, 2^4441065521 is an apocalyptic number.

It is an amenable number.

4441065521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4441065521 is an equidigital number, since it uses as much as digits as its factorization.

4441065521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 4441065521 is about 66641.3199224025. The cubic root of 4441065521 is about 1643.7246201636.

Adding to 4441065521 its reverse (1255601444), we get a palindrome (5696666965).

The spelling of 4441065521 in words is "four billion, four hundred forty-one million, sixty-five thousand, five hundred twenty-one".