

Where to watch
Availability shown for United States · rights vary by countryCast · Directed by Amy Schatz
More from Amy Schatz · Director

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The Number on Great-Grandpa's Arm — streaming FAQ
Which OTT platform streams The Number on Great-Grandpa's Arm?
The Number on Great-Grandpa's Arm is streaming on HBO Max in United States, and available to rent or buy on Amazon Video and Google Play Movies. It's not currently on Netflix.
Is The Number on Great-Grandpa's Arm on Netflix?
No, The Number on Great-Grandpa's Arm is not on Netflix in United States as of September 2026. It's currently on HBO Max.
Is The Number on Great-Grandpa's Arm on Amazon Prime Video?
The Number on Great-Grandpa's Arm isn't included with a Prime Video subscription in United States, but you can rent or buy it on Amazon Video.
Where can I watch The Number on Great-Grandpa's Arm for free?
The Number on Great-Grandpa's Arm is available on HBO Max in United States, but you'll need an active subscription — there's no free option right now.
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