Batch Numbers for respective Film Numbers

No, Leticia. All LDS films do NOT have Batch numbers, - - - and the Librarians at the Family History Center we both frequent tell me that there is no Cross-Index list for Film #-to-existing-Batch numbers.
But Lynn Turner (of LDS in Salt Lake City and a member of this Forum) could set us straight if this is in error !

As to the Film Numbers that you inquired about (#291844, #291845, and #291846) of Silao, Guanajuato, I think they relate to church records of the Santiago Apostol Parish and I do not believe they have respectrive Batch numbers.

I do have 6 Batch Numbers/Film#s for the Santiago Apostol Parish in Neutla (ranging from 1719 to 1843) - - - if it is the same - - - that I can provide you, if they relate to your search.

Saludos,

Efrain