63900816 has 40 divisors (see below), whose sum is σ = 188660544. Its totient is φ = 18257280.

The previous prime is 63900803. The next prime is 63900899. The reversal of 63900816 is 61800936.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94755 + ... + 95426.

Almost surely, 2^63900816 is an apocalyptic number.

It is an amenable number.

63900816 is an abundant number, since it is smaller than the sum of its proper divisors (124759728).

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

63900816 is a wasteful number, since it uses less digits than its factorization.

63900816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190199 (or 190193 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 63900816 is about 7993.7985964121. The cubic root of 63900816 is about 399.7932598313.

The spelling of 63900816 in words is "sixty-three million, nine hundred thousand, eight hundred sixteen".