63881803663 has 8 divisors (see below), whose sum is σ = 66439026896. Its totient is φ = 61373289600.

The previous prime is 63881803639. The next prime is 63881803697. The reversal of 63881803663 is 36630818836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63881803663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63881803663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63881803603) 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, 12174618 + ... + 12179863.

It is an arithmetic number, because the mean of its divisors is an integer number (8304878362).

Almost surely, 2^63881803663 is an apocalyptic number.

63881803663 is a deficient number, since it is larger than the sum of its proper divisors (2557223233).

63881803663 is a wasteful number, since it uses less digits than its factorization.

63881803663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24354585.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 63881803663 in words is "sixty-three billion, eight hundred eighty-one million, eight hundred three thousand, six hundred sixty-three".