868564145 has 12 divisors (see below), whose sum is σ = 1052760540. Its totient is φ = 687931200.

The previous prime is 868564141. The next prime is 868564163. The reversal of 868564145 is 541465868.

It can be written as a sum of positive squares in 6 ways, for example, as 339886096 + 528678049 = 18436^2 + 22993^2 .

It is not a de Polignac number, because 868564145 - 2² = 868564141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 868564145.

It is not an unprimeable number, because it can be changed into a prime (868564141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42491 + ... + 59519.

It is an arithmetic number, because the mean of its divisors is an integer number (87730045).

Almost surely, 2^868564145 is an apocalyptic number.

It is an amenable number.

868564145 is a deficient number, since it is larger than the sum of its proper divisors (184196395).

868564145 is a wasteful number, since it uses less digits than its factorization.

868564145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17236 (or 17135 counting only the distinct ones).

The product of its digits is 921600, while the sum is 47.

The square root of 868564145 is about 29471.4123346676. The cubic root of 868564145 is about 954.1147997545.

The spelling of 868564145 in words is "eight hundred sixty-eight million, five hundred sixty-four thousand, one hundred forty-five".