8564391936 has 135 divisors (see below), whose sum is σ = 24843906633. Its totient is φ = 2842951680.

The previous prime is 8564391931. The next prime is 8564391967. The reversal of 8564391936 is 6391934658.

The square root of 8564391936 is 92544.

It is a perfect power (a square), and thus also a powerful number.

8564391936 is a `hidden beast` number, since 8 + 564 + 39 + 19 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6441025536 + 2123366400 = 80256^2 + 46080^2 .

It is not an unprimeable number, because it can be changed into a prime (8564391931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 35536776 + ... + 35537016.

Almost surely, 2^8564391936 is an apocalyptic number.

8564391936 is the 92544-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8564391936

8564391936 is an abundant number, since it is smaller than the sum of its proper divisors (16279514697).

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

8564391936 is an frugal number, since it uses more digits than its factorization.

8564391936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 246 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The cubic root of 8564391936 is about 2045.9680366979.

The spelling of 8564391936 in words is "eight billion, five hundred sixty-four million, three hundred ninety-one thousand, nine hundred thirty-six".