Int64 Max
Maximum signed 64-bit integer.
How to use Int64 Max
Int64 Max prints 9223372036854775807, the largest signed 64-bit integer (2^63 − 1). Free to use in D2i DevTools — no account required.
Steps
- Nothing to type — this tool has no input fields.
- Click Run.
- Copy the result shown under the button.
Frequently asked questions
What is Int64 Max used for?
Use it when you are checking overflow limits for int64 in Go, C, Java, or similar languages.
How do I use the free online Int64 Max tool?
Nothing to type — this tool has no input fields. Click Run. Copy the result shown under the button.
What can I paste or upload into Int64 Max?
No input. Click Run to show the constant.
What output does Int64 Max give me?
The decimal number 9223372036854775807. The most negative int64 is -9223372036854775808, one beyond the positive range.
Is Int64 Max free, and is my input private?
Yes — Your input is processed in memory for this request only. It is not saved to disk or the database, and it is cleared after the tool finishes.
Is 9223372036854775807 the same as an unsigned maximum?
No. An unsigned 64-bit maximum is about twice as large. This page is the signed maximum only.
Inputs are processed in memory only and are not saved to disk or the database. Data exists only for the duration of your request.