4042656562409 has 2 divisors, whose sum is σ = 4042656562410. Its totient is φ = 4042656562408.

The previous prime is 4042656562403. The next prime is 4042656562457. The reversal of 4042656562409 is 9042656562404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4004113056784 + 38543505625 = 2001028^2 + 196325^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042656562409 - 2³⁶ = 3973937085673 is a prime.

It is not a weakly prime, because it can be changed into another prime (4042656562403) 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, 2021328281204 + 2021328281205.

It is an arithmetic number, because the mean of its divisors is an integer number (2021328281205).

Almost surely, 2^{4042656562409} is an apocalyptic number.

It is an amenable number.

4042656562409 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042656562409 is an equidigital number, since it uses as much as digits as its factorization.

4042656562409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12441600, while the sum is 53.

The spelling of 4042656562409 in words is "four trillion, forty-two billion, six hundred fifty-six million, five hundred sixty-two thousand, four hundred nine".