Post by smosey wales on Jul 8, 2015 15:49:51 GMT -5
It is a number of the form 2n - 1 (with n=6), but it is not a Mersenne prime since n is not prime and 63 is certainly not prime either. It is also a Woodall number i.e. of the form n*2n - 1 with n=4.
It is the third Delannoy number.
It is the smallest whole number that can be divided by any number from 1 to 9 without repeating decimals.
It is the sum of the powers of 2 from 0 to 5, equivalently it is a repdigit in bases 2 (111111), 4 (333), and 8 (77).
In base 10 it is a Harshad number.
