5.98*10^27

$${{\mathtt{10}}}^{{\mathtt{27}}} = {\mathtt{1\,000\,000\,000\,000\,000\,000\,000\,000\,000}}$$

$${\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{1\,000\,000\,000\,000\,000\,000\,000\,000\,000}} = {\mathtt{5\,000\,000\,000\,000\,000\,000\,000\,000\,000}}$$

There you go! There's your ssssuuupppeeeerrrr large answer!