442208738161 has 2 divisors, whose sum is σ = 442208738162. Its totient is φ = 442208738160.

The previous prime is 442208738119. The next prime is 442208738173. The reversal of 442208738161 is 161837802244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402360593761 + 39848144400 = 634319^2 + 199620^2 .

It is a cyclic number.

It is not a de Polignac number, because 442208738161 - 2¹¹ = 442208736113 is a prime.

It is not a weakly prime, because it can be changed into another prime (442208738761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221104369080 + 221104369081.

It is an arithmetic number, because the mean of its divisors is an integer number (221104369081).

Almost surely, 2^442208738161 is an apocalyptic number.

It is an amenable number.

442208738161 is a deficient number, since it is larger than the sum of its proper divisors (1).

442208738161 is an equidigital number, since it uses as much as digits as its factorization.

442208738161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 442208738161 in words is "four hundred forty-two billion, two hundred eight million, seven hundred thirty-eight thousand, one hundred sixty-one".