63543816 has 48 divisors (see below), whose sum is σ = 196684800. Its totient is φ = 18155232.

The previous prime is 63543803. The next prime is 63543817. The reversal of 63543816 is 61834536.

63543816 is a `hidden beast` number, since 635 + 4 + 3 + 8 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (63543817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62536 + ... + 63543.

It is an arithmetic number, because the mean of its divisors is an integer number (4097600).

Almost surely, 2^63543816 is an apocalyptic number.

It is an amenable number.

63543816 is an abundant number, since it is smaller than the sum of its proper divisors (133140984).

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

63543816 is a wasteful number, since it uses less digits than its factorization.

63543816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126098 (or 126091 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 63543816 is about 7971.4375115157. The cubic root of 63543816 is about 399.0473496109.

The spelling of 63543816 in words is "sixty-three million, five hundred forty-three thousand, eight hundred sixteen".