63999825 has 24 divisors (see below), whose sum is σ = 108677568. Its totient is φ = 33209280.

The previous prime is 63999799. The next prime is 63999829. The reversal of 63999825 is 52899936.

63999825 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 63999825 - 2¹⁰ = 63998801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63999829) 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 23 ways as a sum of consecutive naturals, for example, 8757 + ... + 14306.

It is an arithmetic number, because the mean of its divisors is an integer number (4528232).

Almost surely, 2^63999825 is an apocalyptic number.

It is an amenable number.

63999825 is a deficient number, since it is larger than the sum of its proper divisors (44677743).

63999825 is a wasteful number, since it uses less digits than its factorization.

63999825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23113 (or 23108 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 51.

The square root of 63999825 is about 7999.9890624925. The cubic root of 63999825 is about 399.9996354163. Note that the first 3 decimals are identical.

The spelling of 63999825 in words is "sixty-three million, nine hundred ninety-nine thousand, eight hundred twenty-five".