245413610209 has 2 divisors, whose sum is σ = 245413610210. Its totient is φ = 245413610208.

The previous prime is 245413610203. The next prime is 245413610227. The reversal of 245413610209 is 902016314542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245195309584 + 218300625 = 495172^2 + 14775^2 .

It is a cyclic number.

It is not a de Polignac number, because 245413610209 - 2⁷ = 245413610081 is a prime.

It is not a weakly prime, because it can be changed into another prime (245413610203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122706805104 + 122706805105.

It is an arithmetic number, because the mean of its divisors is an integer number (122706805105).

Almost surely, 2^245413610209 is an apocalyptic number.

It is an amenable number.

245413610209 is a deficient number, since it is larger than the sum of its proper divisors (1).

245413610209 is an equidigital number, since it uses as much as digits as its factorization.

245413610209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 245413610209 in words is "two hundred forty-five billion, four hundred thirteen million, six hundred ten thousand, two hundred nine".