I think the only audiobook possibly longer than that would be a Bible.
Seems extraordinarily long when compared to other books with higher page counts. I know page count isn't everything and can be manipulated by the publisher, but long books like Atlas Shrugged which has a huge page count even in editions with super small type sizes is like 30 hours shorter than this. A Dance with Dragons is huge and nowhere near this long either.
EDIT: According to the publisher of the audiobook Seveneves is 32 hours unabridged, not the 96+ hours Audible says.
https://www.brillianceaudio.com/product?i=6856
This seems more realistic given the books advertised page count.