---
title: HMCharacteristicMetadataFormatUInt64
framework: homekit
role: symbol
role_heading: Global Variable
path: homekit/hmcharacteristicmetadataformatuint64
---

# HMCharacteristicMetadataFormatUInt64

Indicates that the characteristic has unsigned 64-bit integer values.

## Declaration

```swift
let HMCharacteristicMetadataFormatUInt64: String
```

## Discussion

Discussion The value is an NSNumber object containing an unsigned 64-bit integer with a range [0, 18446744073709551615].

## See Also

### Unsigned Integers

- [HMCharacteristicMetadataFormatUInt8](homekit/hmcharacteristicmetadataformatuint8.md)
- [HMCharacteristicMetadataFormatUInt16](homekit/hmcharacteristicmetadataformatuint16.md)
- [HMCharacteristicMetadataFormatUInt32](homekit/hmcharacteristicmetadataformatuint32.md)