The LaTeX command for asterisk (∗) is \textasteriskcentered.
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Write \textasteriskcentered in normal text, outside math mode. It is part of core LaTeX, so no extra package is required.
\textasteriskcentered is a text command: inside a formula it needs \text{...} from amsmath. With XeLaTeX or LuaLaTeX you can also type ∗ directly.
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\textbullet\dots-----\textasciitilde\textasciicircum\textbackslash\slash``''\textcopyright\textregistered\texttrademark\poundsText symbols in LaTeX: the full table or search all 350+ LaTeX symbols.
Use \textasteriskcentered in normal text; it needs no extra package. For example, \textasteriskcentered.
None: \textasteriskcentered is built into LaTeX, so no extra package is required.