63636945 has 16 divisors (see below), whose sum is σ = 103254912. Its totient is φ = 33461120.

The previous prime is 63636917. The next prime is 63636959. The reversal of 63636945 is 54963636.

63636945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63636945 - 2⁵ = 63636913 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 63636897 and 63636906.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28812 + ... + 30941.

It is an arithmetic number, because the mean of its divisors is an integer number (6453432).

Almost surely, 2^63636945 is an apocalyptic number.

It is an amenable number.

63636945 is a deficient number, since it is larger than the sum of its proper divisors (39617967).

63636945 is a wasteful number, since it uses less digits than its factorization.

63636945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59832.

The product of its digits is 349920, while the sum is 42.

The square root of 63636945 is about 7977.2767909858. The cubic root of 63636945 is about 399.2422006737.

The spelling of 63636945 in words is "sixty-three million, six hundred thirty-six thousand, nine hundred forty-five".