63689216 has 40 divisors (see below), whose sum is σ = 133972080. Its totient is φ = 30163968.

The previous prime is 63689209. The next prime is 63689239. The reversal of 63689216 is 61298636.

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 3 ways as a sum of consecutive naturals, for example, 6455 + ... + 13001.

It is an arithmetic number, because the mean of its divisors is an integer number (3349302).

Almost surely, 2^63689216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63689216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66986040).

63689216 is an abundant number, since it is smaller than the sum of its proper divisors (70282864).

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

63689216 is an equidigital number, since it uses as much as digits as its factorization.

63689216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584 (or 6568 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 63689216 is about 7980.5523618356. The cubic root of 63689216 is about 399.3514824641.

The spelling of 63689216 in words is "sixty-three million, six hundred eighty-nine thousand, two hundred sixteen".