4505044721 has 2 divisors, whose sum is σ = 4505044722. Its totient is φ = 4505044720.

The previous prime is 4505044697. The next prime is 4505044729. The reversal of 4505044721 is 1274405054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4428237025 + 76807696 = 66545^2 + 8764^2 .

It is a cyclic number.

It is not a de Polignac number, because 4505044721 - 2⁶ = 4505044657 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 (4505044729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2252522360 + 2252522361.

It is an arithmetic number, because the mean of its divisors is an integer number (2252522361).

Almost surely, 2^4505044721 is an apocalyptic number.

It is an amenable number.

4505044721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4505044721 is an equidigital number, since it uses as much as digits as its factorization.

4505044721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 4505044721 is about 67119.6299229964. The cubic root of 4505044721 is about 1651.5803311531.

Adding to 4505044721 its reverse (1274405054), we get a palindrome (5779449775).

The spelling of 4505044721 in words is "four billion, five hundred five million, forty-four thousand, seven hundred twenty-one".