4509116021 has 2 divisors, whose sum is σ = 4509116022. Its totient is φ = 4509116020.

The previous prime is 4509115993. The next prime is 4509116039. The reversal of 4509116021 is 1206119054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3447333796 + 1061782225 = 58714^2 + 32585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4509116021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4509116071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2254558010 + 2254558011.

It is an arithmetic number, because the mean of its divisors is an integer number (2254558011).

Almost surely, 2^4509116021 is an apocalyptic number.

It is an amenable number.

4509116021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4509116021 is an equidigital number, since it uses as much as digits as its factorization.

4509116021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 4509116021 is about 67149.9517572425. The cubic root of 4509116021 is about 1652.0777035340.

The spelling of 4509116021 in words is "four billion, five hundred nine million, one hundred sixteen thousand, twenty-one".