To solve the equation \( p \cdot \sqrt{5} = p^5 \), we can start by isolating \( p \).
Assuming \( p \neq 0 \), we can divide both sides by \( p \):
\[ \sqrt{5} = p^4 \]
Now, we take the fourth root of both sides to solve for \( p \):
\[ p = \sqrt[4]{\sqrt{5}} = 5^{1/8} \]
Thus, the number that makes the statement true is:
\[ \boxed{5^{1/8}} \]