usigned long long

根据引用\[1\]和引用\[2\]的内容，unsigned long long是一种常见的整型基本数据类型。它的字节占位和数据范围是64位，即占8个字节，数据范围为0到2^64-1。\[2\]在64位系统上，unsigned long long的长度为64位。\[3\]所以，unsigned long long在64位系统上占据64位。
#### 引用[.reference_title]
- *1* *3* [无符号整型 unsigned int、unsigned long、usigned long long、size_t 比较和格式控制](https://blog.csdn.net/weixin_30871293/article/details/98564705)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [c语言-----整型数据类型详解](https://blog.csdn.net/x18037177724/article/details/126349196)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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