Those are the realms #28 through #31, the arupavacara realms:
“31 Realms of Existence“.
Only a trace is matter (rupa) exists there: the hadaya vatthu of those beings. Not even a single pasada rupa exists for that living being, who is called an arupavacara brahma; they can only think.
If a human cultivates arupavacara jhana, he/she would experience that too, i.e., no other sense faculty will function in those jhana. Of course his/her whole body will be kept alive.