Ab 13b9, 4th inversion (A in the bass)
Also written as Ab13b9/A.
Notes, from the bass up
A (bass)E#G#B#D#F#
The same notes as Ab 13b9 (A, E#, G#, B#, D# and F#), rearranged so A is the lowest note. Use it to move between chords with smaller jumps across the keyboard.