Db 13sus4, 4th inversion (D# in the bass)
Also written as Db13sus4/D#.
Notes, from the bass up
D# (bass)A#C#F#G#B
The same notes as Db 13sus4 (D#, A#, C#, F#, G# and B), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.