63685216 has 48 divisors (see below), whose sum is σ = 143851680. Its totient is φ = 27187200.

The previous prime is 63685211. The next prime is 63685217. The reversal of 63685216 is 61258636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63685211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89470 + ... + 90178.

It is an arithmetic number, because the mean of its divisors is an integer number (2996910).

Almost surely, 2^63685216 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 63685216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71925840).

63685216 is an abundant number, since it is smaller than the sum of its proper divisors (80166464).

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

63685216 is a wasteful number, since it uses less digits than its factorization.

63685216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1119 counting only the distinct ones).

The product of its digits is 51840, while the sum is 37.

The square root of 63685216 is about 7980.3017486809. The cubic root of 63685216 is about 399.3431218683.

The spelling of 63685216 in words is "sixty-three million, six hundred eighty-five thousand, two hundred sixteen".