# Factor x^4-81

Factor x^4-81
Rewrite as .
Rewrite as .
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Simplify.
Rewrite as .
Factor.
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Remove unnecessary parentheses.
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### Name

Name one billion six hundred sixty-nine million four hundred twenty-eight thousand seven hundred seventy-three

### Interesting facts

• 1669428773 has 4 divisors, whose sum is 1669590060
• The reverse of 1669428773 is 3778249661
• Previous prime number is 11117

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 53
• Digital Root 8

### Name

Name one billion two hundred fifteen million two hundred two thousand eight hundred thirty-two

### Interesting facts

• 1215202832 has 32 divisors, whose sum is 6151964418
• The reverse of 1215202832 is 2382025121
• Previous prime number is 2

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 26
• Digital Root 8

### Name

Name eight hundred eighty-six million six hundred sixty-nine thousand six hundred sixty-eight

### Interesting facts

• 886669668 has 32 divisors, whose sum is 2223093600
• The reverse of 886669668 is 866966688
• Previous prime number is 347

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 63
• Digital Root 9