442168338169 has 2 divisors, whose sum is σ = 442168338170. Its totient is φ = 442168338168.

The previous prime is 442168338163. The next prime is 442168338217. The reversal of 442168338169 is 961833861244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345170350144 + 96997988025 = 587512^2 + 311445^2 .

It is a cyclic number.

It is not a de Polignac number, because 442168338169 - 2²⁵ = 442134783737 is a prime.

It is a super-2 number, since 2×442168338169² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442168338163) 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, 221084169084 + 221084169085.

It is an arithmetic number, because the mean of its divisors is an integer number (221084169085).

Almost surely, 2^442168338169 is an apocalyptic number.

It is an amenable number.

442168338169 is a deficient number, since it is larger than the sum of its proper divisors (1).

442168338169 is an equidigital number, since it uses as much as digits as its factorization.

442168338169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 55.

The spelling of 442168338169 in words is "four hundred forty-two billion, one hundred sixty-eight million, three hundred thirty-eight thousand, one hundred sixty-nine".