63647216 has 20 divisors (see below), whose sum is σ = 127295424. Its totient is φ = 30796800.

The previous prime is 63647203. The next prime is 63647237. The reversal of 63647216 is 61274636.

63647216 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63665 + ... + 64656.

Almost surely, 2^63647216 is an apocalyptic number.

It is an amenable number.

63647216 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

63647216 is a wasteful number, since it uses less digits than its factorization.

63647216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128360 (or 128354 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 63647216 is about 7977.9205310657. The cubic root of 63647216 is about 399.2636787425.

The spelling of 63647216 in words is "sixty-three million, six hundred forty-seven thousand, two hundred sixteen".