I've recently found that the value of token transfers are in 10^18 hex value.
For example, in this event, the hex value of the token transfer is
00000000000000000000000000000000000000000000000ad62b76e268960000 converted to decimal is
199900000000000000000. However, the token transfer value should be
199.9 according to here. Therefore, the original number was divided by 10^18.
I found it is the same case for other tokens EOS, QTUM and ICONOMI. Therefore I assume that it is common for Ethereum. I was wondering if
199900000000000000000 is in wei?