text column parses large number as float

Is there any reason why a large number (for axample

3153414733313030323138383038

3153414733313030323138383038

gets seen as a large number like

3.153414733313E+27

3.153414733313E+27

instead of just a string when using textColumn? When I add in my DB an A in front of the number it works just fine?