Show a number as text

I have phone numbers in a column, I am adding a country code and then writing these to a txt file - however I get 3.54E+11 instead of the full number. How can I force these to be written as the 'real' number to the text file. Thanks

Hi and welcome to the board
You posted in an Access forum. is this correct?

In answer to your question , when adding a country code ( don't know how you do it), you could add an apostrophe before this code, turning it to text