8133865056 has 144 divisors (see below), whose sum is σ = 23729902560. Its totient is φ = 2641766400.

The previous prime is 8133865039. The next prime is 8133865121. The reversal of 8133865056 is 6505683318.

8133865056 is a `hidden beast` number, since 8 + 133 + 8 + 6 + 505 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

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, 2303100 + ... + 2306628.

It is an arithmetic number, because the mean of its divisors is an integer number (164790990).

Almost surely, 2^8133865056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8133865056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11864951280).

8133865056 is an abundant number, since it is smaller than the sum of its proper divisors (15596037504).

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

8133865056 is a wasteful number, since it uses less digits than its factorization.

8133865056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749 (or 3738 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 8133865056 is about 90187.9429635691. The cubic root of 8133865056 is about 2011.0937716709.

The spelling of 8133865056 in words is "eight billion, one hundred thirty-three million, eight hundred sixty-five thousand, fifty-six".