63885642768 has 30 divisors (see below), whose sum is σ = 178791070094. Its totient is φ = 21295214208.

The previous prime is 63885642757. The next prime is 63885642803. The reversal of 63885642768 is 86724658836.

63885642768 is a `hidden beast` number, since 6 + 3 + 8 + 8 + 564 + 2 + 7 + 68 = 666.

63885642768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60138733824 + 3746908944 = 245232^2 + 61212^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221825005 + ... + 221825292.

Almost surely, 2^63885642768 is an apocalyptic number.

It is an amenable number.

63885642768 is an abundant number, since it is smaller than the sum of its proper divisors (114905427326).

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

63885642768 is a wasteful number, since it uses less digits than its factorization.

63885642768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443650311 (or 443650302 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 63.

The spelling of 63885642768 in words is "sixty-three billion, eight hundred eighty-five million, six hundred forty-two thousand, seven hundred sixty-eight".