int64 - signed 64-bit integer

Base type: number, string.

The int64 format represents a signed 64-bit integer, with the range -9223372036854775808 through 9223372036854775807. This format entry is to ensure future versions of OpenAPI maintain compatibility with OpenAPI 3.0.x.

Representation as a JSON string is recommended for values outside the 53-bit range (-9007199254740991 through 9007199254740991) as this avoids problems with recipients that parse JSON numbers into binary64 memory representation.