א 1 + ל 30 + ה 5 + י 10 + ם 40 = 86. With the final mem at 600 (mispar gadol) the same word is 646.
Meaning
Elohim is the name of the Creator in Genesis 1 and the name the tradition reads as the name of judgement, against YHVH, the name of mercy. Its 86 puts it at the head of a small family of compounds — Binah's name is YHVH Elohim (112) — and 86 is the number the handlists use when they want to find the Creator hidden inside another word. The plural form is read by the midrash as a plural of majesty and by modern philology as a residue of an older pantheon.