Ab 13sus4, 5th inversion (E# in the bass)
Also written as Ab13sus4/E#.
Notes, from the bass up
E# (bass)G#C#D#F#A#
The same notes as Ab 13sus4 (E#, G#, C#, D#, F# and A#), rearranged so E# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.