63644036 has 24 divisors (see below), whose sum is σ = 116499264. Its totient is φ = 30365280.

The previous prime is 63644029. The next prime is 63644041. The reversal of 63644036 is 63044636.

It is a junction number, because it is equal to n+sod(n) for n = 63643993 and 63644011.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 74186 + ... + 75038.

It is an arithmetic number, because the mean of its divisors is an integer number (4854136).

Almost surely, 2^63644036 is an apocalyptic number.

It is an amenable number.

63644036 is a deficient number, since it is larger than the sum of its proper divisors (52855228).

63644036 is a wasteful number, since it uses less digits than its factorization.

63644036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691 (or 1689 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 63644036 is about 7977.7212285213. The cubic root of 63644036 is about 399.2570291736.

The spelling of 63644036 in words is "sixty-three million, six hundred forty-four thousand, thirty-six".