8109564912 has 40 divisors (see below), whose sum is σ = 23277456080. Its totient is φ = 2703188160.

The previous prime is 8109564899. The next prime is 8109564913. The reversal of 8109564912 is 2194659018.

8109564912 is a `hidden beast` number, since 8 + 109 + 56 + 491 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8109564913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9385639 + ... + 9386502.

It is an arithmetic number, because the mean of its divisors is an integer number (581936402).

Almost surely, 2^8109564912 is an apocalyptic number.

It is an amenable number.

8109564912 is an abundant number, since it is smaller than the sum of its proper divisors (15167891168).

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

8109564912 is a wasteful number, since it uses less digits than its factorization.

8109564912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18772158 (or 18772146 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 8109564912 is about 90053.1227220911. The cubic root of 8109564912 is about 2009.0890414253.

The spelling of 8109564912 in words is "eight billion, one hundred nine million, five hundred sixty-four thousand, nine hundred twelve".