16
16.
16
There can't be a prime number that has a square root because the square root would be a factor of the number.
16
16
25 is a square number that is a factor of 50 and a multiple of the prime number 5.
289
The largest square factor of 557 is 1 because 557 is a prime number
A prime number with identical digits is 11.
No. That isn't possible: A prime number, by definition, has no smaller factors. A square number does have a smaller factor - the number that is squared.
That is a very good question. The awnser is quite simple, its a number.
No, there are no prime numbers that are also square numbers. Prime numbers are only divisible by 1 and themselves, while square numbers have integer square roots. Since the square root of a prime number is not an integer, a prime number cannot be a square number.