638846788716 has 72 divisors (see below), whose sum is σ = 1622370894144. Its totient is φ = 211961011680.

The previous prime is 638846788703. The next prime is 638846788733. The reversal of 638846788716 is 617887648836.

638846788716 is a `hidden beast` number, since 6 + 3 + 88 + 467 + 8 + 87 + 1 + 6 = 666.

638846788716 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7088151 + ... + 7177713.

Almost surely, 2^638846788716 is an apocalyptic number.

It is an amenable number.

638846788716 is an abundant number, since it is smaller than the sum of its proper divisors (983524105428).

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

638846788716 is a wasteful number, since it uses less digits than its factorization.

638846788716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90491 (or 90486 counting only the distinct ones).

The product of its digits is 520224768, while the sum is 72.

The spelling of 638846788716 in words is "six hundred thirty-eight billion, eight hundred forty-six million, seven hundred eighty-eight thousand, seven hundred sixteen".