8168861536 has 48 divisors (see below), whose sum is σ = 17580024000. Its totient is φ = 3705598080.

The previous prime is 8168861527. The next prime is 8168861567. The reversal of 8168861536 is 6351688618.

It is a congruent number.

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, 152395 + ... + 198901.

It is an arithmetic number, because the mean of its divisors is an integer number (366250500).

Almost surely, 2^8168861536 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 8168861536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8790012000).

8168861536 is an abundant number, since it is smaller than the sum of its proper divisors (9411162464).

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

8168861536 is a wasteful number, since it uses less digits than its factorization.

8168861536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47027 (or 47019 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The square root of 8168861536 is about 90381.7544419226. The cubic root of 8168861536 is about 2013.9739318887.

The spelling of 8168861536 in words is "eight billion, one hundred sixty-eight million, eight hundred sixty-one thousand, five hundred thirty-six".