A 13b9, 2nd inversion (E in the bass)
Also written as A13b9/E.
Notes, from the bass up
E (bass)GBbF#AC#
The same notes as A 13b9 (E, G, Bb, F#, A and C#), rearranged so E is the lowest note. Use it to move between chords with smaller jumps across the keyboard.