8659561836 has 24 divisors (see below), whose sum is σ = 20405703024. Its totient is φ = 2857940800.

The previous prime is 8659561819. The next prime is 8659561843. The reversal of 8659561836 is 6381659568.

It is a super-2 number, since 2×8659561836² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3571215 + ... + 3573638.

It is an arithmetic number, because the mean of its divisors is an integer number (850237626).

Almost surely, 2^8659561836 is an apocalyptic number.

It is an amenable number.

8659561836 is an abundant number, since it is smaller than the sum of its proper divisors (11746141188).

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

8659561836 is a wasteful number, since it uses less digits than its factorization.

8659561836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144961 (or 7144959 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 57.

The square root of 8659561836 is about 93056.7667394478. The cubic root of 8659561836 is about 2053.5185922993.

The spelling of 8659561836 in words is "eight billion, six hundred fifty-nine million, five hundred sixty-one thousand, eight hundred thirty-six".