459045..............the 11th through the 16th number in e.................................11 + 16 = 27...............459045............................six numbers.................added..............digit by digit.............they sum to 27...............................27 + 27 = 54...............reflexive symmetry........with 45.............

45 + 54 = 99.............two nines.........9 + 9 = 18..........like 180 degrees.......half a circle...............1/2 + 14i.......................

e (Euler's Number)

The number e is a famous irrational number, and is one of the most important numbers in mathematics.
The first few digits are:

2.7182818284590452353602874713527 (and more ...)

It is often called Euler's number after Leonhard Euler (pronounced "Oiler").

e is the base of the Natural Logarithms (invented by John Napier).
e is found in many interesting areas, so it is worth learning about.