Your username looks like a phone number. If that's what it is, I suggest that you change it. This is a public web site that anyone can view, including scammers and hackers. To change your username, click your avatar in the top right corner of the community screen. On the menu that opens click My Settings. On the settings screen click Personal at the top left, then under that click Username (if not already selected). Enter the new name that you want in the box, then click Change Username.