Ab 13sus4, 3rd inversion (F# in the bass)
Also written as Ab13sus4/F#.
Notes, from the bass up
F# (bass)A#E#G#C#D#
The same notes as Ab 13sus4 (F#, A#, E#, G#, C# and D#), rearranged so F# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.