63994636 has 12 divisors (see below), whose sum is σ = 114373728. Its totient is φ = 31316432.

The previous prime is 63994631. The next prime is 63994639. The reversal of 63994636 is 63649936.

63994636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63994631) 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 3 ways as a sum of consecutive naturals, for example, 170011 + ... + 170386.

It is an arithmetic number, because the mean of its divisors is an integer number (9531144).

Almost surely, 2^63994636 is an apocalyptic number.

It is an amenable number.

63994636 is a deficient number, since it is larger than the sum of its proper divisors (50379092).

63994636 is a wasteful number, since it uses less digits than its factorization.

63994636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340448 (or 340446 counting only the distinct ones).

The product of its digits is 629856, while the sum is 46.

The square root of 63994636 is about 7999.6647429752. The cubic root of 63994636 is about 399.9888246878.

The spelling of 63994636 in words is "sixty-three million, nine hundred ninety-four thousand, six hundred thirty-six".