63857606856 has 16 divisors (see below), whose sum is σ = 159644017200. Its totient is φ = 21285868944.

The previous prime is 63857606849. The next prime is 63857606867. The reversal of 63857606856 is 65860675836.

63857606856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 63857606856.

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, 1330366786 + ... + 1330366833.

It is an arithmetic number, because the mean of its divisors is an integer number (9977751075).

Almost surely, 2^63857606856 is an apocalyptic number.

It is an amenable number.

63857606856 is an abundant number, since it is smaller than the sum of its proper divisors (95786410344).

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

63857606856 is a wasteful number, since it uses less digits than its factorization.

63857606856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660733628 (or 2660733624 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 63857606856 in words is "sixty-three billion, eight hundred fifty-seven million, six hundred six thousand, eight hundred fifty-six".