2042404662209 has 2 divisors, whose sum is σ = 2042404662210. Its totient is φ = 2042404662208.

The previous prime is 2042404662197. The next prime is 2042404662211. The reversal of 2042404662209 is 9022664042402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1935724037809 + 106680624400 = 1391303^2 + 326620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2042404662209 - 2²⁴ = 2042387884993 is a prime.

Together with 2042404662211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2042404662299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1021202331104 + 1021202331105.

It is an arithmetic number, because the mean of its divisors is an integer number (1021202331105).

Almost surely, 2^{2042404662209} is an apocalyptic number.

It is an amenable number.

2042404662209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2042404662209 is an equidigital number, since it uses as much as digits as its factorization.

2042404662209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 2042404662209 in words is "two trillion, forty-two billion, four hundred four million, six hundred sixty-two thousand, two hundred nine".