How to convert a query hash to uint64?

How do I convert the query hash string "0x9F37D9B585242D49" to a uint64 needed by my extended event filter? Casting to bigint doesn't work as the value goes negative.

event
sql_statement_completed

filter
field : sqlserver.query_hash
operator : equal_uint64
value ???

TSQL doesn't have unsigned 64bit integers, but .NET does.

var hash = 0x9F37D9B585242D49;
Console.WriteLine(hash);

outputs

11472877949395676489

And you also can filter on query_hash_signed and provide a singed 64bit integer, which TSQL can produce

select cast(0x9F37D9B585242D49 as bigint)

outputs

-6973866124313875127

StackExchange Database Administrators Q#300477, answer score: 5