To find the number of digits, use
There are 378632 digits in the number, not subtracting the 1.
For the first few digits of the huge number, use
The first 3 digits are 412.
First the leading 3 digits of are the same as those of , so we need only consider the latter.
Now: .
Now the in the exponent above just tells you how far the decimal point in the answer is to the left of the most significant digit, and the fractional part tells you what the digits are.
RonL