42841850209 has 2 divisors, whose sum is σ = 42841850210. Its totient is φ = 42841850208.

The previous prime is 42841850203. The next prime is 42841850281. The reversal of 42841850209 is 90205814824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21520009809 + 21321840400 = 146697^2 + 146020^2 .

It is a cyclic number.

It is not a de Polignac number, because 42841850209 - 2³ = 42841850201 is a prime.

It is not a weakly prime, because it can be changed into another prime (42841850201) 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, 21420925104 + 21420925105.

It is an arithmetic number, because the mean of its divisors is an integer number (21420925105).

Almost surely, 2^42841850209 is an apocalyptic number.

It is an amenable number.

42841850209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42841850209 is an equidigital number, since it uses as much as digits as its factorization.

42841850209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 42841850209 in words is "forty-two billion, eight hundred forty-one million, eight hundred fifty thousand, two hundred nine".