i3p.16xlarge is an AWS EC2 instance with 64 vCPUs, 488 GiB memory (Intel Xeon E5-2686 v4 (Broadwell)). In AWS GovCloud (US-West) it costs $6.016 per hour on demand ($4,391.68 per month) for Linux.
Prices by region
USD per hour, Linux. Reserved prices are no upfront, standard. Cheapest on-demand first.