Eb 13sus4, 4th inversion (E# in the bass)
Also written as Eb13sus4/E#.
Notes, from the bass up
E# (bass)B#D#G#A#C#
The same notes as Eb 13sus4 (E#, B#, D#, G#, A# and C#), rearranged so E# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.