If I deactivate my Facebook Account+Opt out of receiving notifications, will my account username exist anymore?

[Khoi Minh Vu]

And I am also trying to know that: If I deactivate my Facebook Account+opt out of receiving notifications and messages on Facebook, would it be that I have permanently deactivated my Facebook Account?

Furthermore, I am trying to know more: If I permanently deactivate my Facebook Account, then will I ever reactivate my Facebook Account back again?
And finally, I wanted to extend this alittle bit more:
So if I deactivate my Facebook Account Opt out of receiving any notifications and messages, will it also stop me from reactivating my Facebook Account back again?
And do i need to recreate my FB account back again?

[john]

If you deactivate it, it will be the equivalent as if it does not exist however you can always reactivate it by just logging in with your email address and password

[Daniel]

Your Profile Will Be Offline if you Deactivate It your Username Will Still Exist Unless you Permanently Delete While your Profile is Offline tho If Someone types in your Facebook username they Wont Be Able to Find you Because the Profile Will Be a Broken Link

[Angeleyes]

If you decide to deactivate your account, you will become unsearchable, you can reactivate account any time by logging in again with your email address and password.