License needed for ESXI 6.5 Host as per the details given

hi,

We've one ESXI 6.5 with 6 Guest OS, on HP Server Intel(R) Xeon(R) Silver 4110 CPU @ 2.10GHz, 128 GM RAM, Sockets 2, Cores per socket 8, Hyper threading enabled, Logical processors 32.

Kindly advice what type of license required and how many?

Thanks in advance