Lover Numbers

Saifullah Talukder is $22$ years old and yet he had no luck in his love life so far. He has lost all hope about this. Thinking that he will never have any love in his life he started to think about love between numbers. According to him two numbers are in love with each other if their bitwise-xor and sum are equal. For example: bitwise-xor of $160$ and $75$ is $235$ and their sum is also $235$. He