63863991696 has 20 divisors (see below), whose sum is σ = 164981978672. Its totient is φ = 21287997216.

The previous prime is 63863991679. The next prime is 63863991701. The reversal of 63863991696 is 69619936836.

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, 665249866 + ... + 665249961.

Almost surely, 2^63863991696 is an apocalyptic number.

It is an amenable number.

63863991696 is an abundant number, since it is smaller than the sum of its proper divisors (101117986976).

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

63863991696 is a wasteful number, since it uses less digits than its factorization.

63863991696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330499838 (or 1330499832 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 66.

The spelling of 63863991696 in words is "sixty-three billion, eight hundred sixty-three million, nine hundred ninety-one thousand, six hundred ninety-six".