well spotted great ape that surely can’t be a coincidence.
Eighty-one is the square of 9 and the fourth power of 3. Like all powers of three, 81 is a perfect totient number. It is a heptagonal number and a centered octagonal number. It is also a tribonacci number, and an open meandric number. 81 is the ninth member of the Mian-Chowla sequence.
In base 10, it is a Harshad number, and one of three non-trivial numbers (the other two are 1458 and 1729) which, when its digits are added together, produces a sum which, when multiplied by its reversed self, yields the original number:
8 + 1 = 9
9 × 9 = 81
818 is also an area code in california
“The Valley” — the San Fernando Valley that encompasses the northern portion of the City of Los Angeles (although it constantly wants to secede). Known for Valley Girls (“yeah, like gag me with a spoon… as if!”), the Galleria and a climate significantly hotter than the other side of the hill and thus rivaling Hell. Also the porn capital of the Western Hemisphere.
should keep jivebunny busy for a while