hard

The number 8549176320. What makes it unique?

The digits are in alphabetical order.

Why this works

This riddle plays with the concept of ordering, but instead of numerical order, it uses the alphabetical arrangement of the digits when spelled out. If you write out each digit as a word—eight, five, four, nine, one, seven, six, three, two, zero—you'll see they are arranged in alphabetical order: eight, five, four, nine, one, seven, six, three, two, zero. This clever twist on ordering makes the number 8549176320 unique!

Common Wrong Answers

“It is a palindrome.”

A palindrome reads the same forwards and backwards, but 8549176320 does not meet this criterion.

“It is a prime number.”

A prime number is only divisible by 1 and itself, but 8549176320 is divisible by many numbers, making it composite.

“It is an even number.”

While the number 8549176320 is indeed even, this characteristic does not make it unique compared to many other numbers.

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