45220320209 has 2 divisors, whose sum is σ = 45220320210. Its totient is φ = 45220320208.

The previous prime is 45220320181. The next prime is 45220320221. The reversal of 45220320209 is 90202302254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44971564225 + 248755984 = 212065^2 + 15772^2 .

It is a cyclic number.

It is not a de Polignac number, because 45220320209 - 2²⁰ = 45219271633 is a prime.

It is not a weakly prime, because it can be changed into another prime (45220320109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22610160104 + 22610160105.

It is an arithmetic number, because the mean of its divisors is an integer number (22610160105).

Almost surely, 2^45220320209 is an apocalyptic number.

It is an amenable number.

45220320209 is a deficient number, since it is larger than the sum of its proper divisors (1).

45220320209 is an equidigital number, since it uses as much as digits as its factorization.

45220320209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 45220320209 in words is "forty-five billion, two hundred twenty million, three hundred twenty thousand, two hundred nine".