Aparmita is the name given to Amitabha in his character of bestower of longevity. Aparmita may be turned either a “Crowned Buddha or a Bodhisattva and is therefore richly clad and wears the thirteen ornaments.
Akshobhya Buddha is one of the five Tathagatas symbolizing mirror like wisdom (in Sanskrit Adarsa Jnana) which means the wisdom like space, all pervasive, without periphery and without characteristics.