9936863856 has 60 divisors (see below), whose sum is σ = 28561038792. Its totient is φ = 3222764928.

The previous prime is 9936863821. The next prime is 9936863869. The reversal of 9936863856 is 6583686399.

It is a junction number, because it is equal to n+sod(n) for n = 9936863793 and 9936863802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 927186 + ... + 937841.

Almost surely, 2^9936863856 is an apocalyptic number.

It is an amenable number.

9936863856 is an abundant number, since it is smaller than the sum of its proper divisors (18624174936).

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

9936863856 is a wasteful number, since it uses less digits than its factorization.

9936863856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865078 (or 1865069 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 63.

The square root of 9936863856 is about 99683.8194292333. The cubic root of 9936863856 is about 2149.8910242944.

The spelling of 9936863856 in words is "nine billion, nine hundred thirty-six million, eight hundred sixty-three thousand, eight hundred fifty-six".