-54 is an even number.
-54 is a Harshad number, which means it is divisible by the sum of its digits (5 + 4 = 9, and -54 is divisible by 9).
In binary, -54 is represented as 1111111111111111111111111111111111111111111111111111111111001010.
In hex, -54 is represented as ffffffffffffffca.