63881216 has 60 divisors (see below), whose sum is σ = 146271888. Its totient is φ = 27328512.

The previous prime is 63881201. The next prime is 63881221. The reversal of 63881216 is 61218836.

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, 114410 + ... + 114966.

Almost surely, 2^63881216 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 63881216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73135944).

63881216 is an abundant number, since it is smaller than the sum of its proper divisors (82390672).

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

63881216 is an frugal number, since it uses more digits than its factorization.

63881216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 566 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 63881216 is about 7992.5725520636. The cubic root of 63881216 is about 399.7523800759.

The spelling of 63881216 in words is "sixty-three million, eight hundred eighty-one thousand, two hundred sixteen".