What is 644 with an exponent of 0?

644 with an exponent of 0 means that 644 is the base (b) and 0 is the exponent (n).

Here is how you would display the number 644 with an exponent of 0 in mathematical terms:

bⁿ ⇒ 644⁰

Furthermore, the power of zero rule is as follows:

b⁰ = 1

where b can be anything. Therefore, the answer to 644 with an exponent of 0 is:

644⁰ = 1

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