63544866 has 80 divisors (see below), whose sum is σ = 162144288. Its totient is φ = 16464000.

The previous prime is 63544853. The next prime is 63544867. The reversal of 63544866 is 66844536.

63544866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (63544867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 158266 + ... + 158666.

Almost surely, 2^63544866 is an apocalyptic number.

63544866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 63544866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81072144).

63544866 is an abundant number, since it is smaller than the sum of its proper divisors (98599422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63544866 is a wasteful number, since it uses less digits than its factorization.

63544866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 424 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 63544866 is about 7971.5033713848. The cubic root of 63544866 is about 399.0495475558.

The spelling of 63544866 in words is "sixty-three million, five hundred forty-four thousand, eight hundred sixty-six".