A Major 7#11, 4th inversion (D# in the bass)
Also written as Amaj7#11/D#.
Notes, from the bass up
D# (bass)AC#EG#
The same notes as A Major 7#11 (D#, A, C#, E and G#), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.