Change number stored as text to number without changing the actual number

[PhathuM]

Hi Guys, I am trying to convert a number stored as text that I exported from SAP, but when I convert it to a number, it changes the last 3 digits of the number to zeros. e.g. 360010077844515535 changes to 360010077844515000. How can I convert the number stored as text without the actual number being changed?