45345998909 has 2 divisors, whose sum is σ = 45345998910. Its totient is φ = 45345998908.

The previous prime is 45345998897. The next prime is 45345998923. The reversal of 45345998909 is 90989954354.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44053812100 + 1292186809 = 209890^2 + 35947^2 .

It is a cyclic number.

It is not a de Polignac number, because 45345998909 - 2⁸ = 45345998653 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 (45345998939) 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, 22672999454 + 22672999455.

It is an arithmetic number, because the mean of its divisors is an integer number (22672999455).

Almost surely, 2^45345998909 is an apocalyptic number.

It is an amenable number.

45345998909 is a deficient number, since it is larger than the sum of its proper divisors (1).

45345998909 is an equidigital number, since it uses as much as digits as its factorization.

45345998909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62985600, while the sum is 65.

The spelling of 45345998909 in words is "forty-five billion, three hundred forty-five million, nine hundred ninety-eight thousand, nine hundred nine".