Definition: An integer $\displaystyle b$ is said to be divisible by an integer $\displaystyle a \neq 0$, in symbols $\displaystyle a|b$, if there exists some integer $\displaystyle c$ such that $\displaystyle b=ac$.

If b is infinity $\displaystyle \infty$, then what are the possible a?

I think $\displaystyle a$ can be any number. Is it true?