865525568 has 56 divisors (see below), whose sum is σ = 1752795072. Its totient is φ = 423972864.

The previous prime is 865525567. The next prime is 865525589.

865525568 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865525567) 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, 663605 + ... + 664907.

It is an arithmetic number, because the mean of its divisors is an integer number (31299912).

Almost surely, 2^865525568 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 865525568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876397536).

865525568 is an abundant number, since it is smaller than the sum of its proper divisors (887269504).

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

865525568 is a wasteful number, since it uses less digits than its factorization.

865525568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519 (or 1509 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 50.

The square root of 865525568 is about 29419.8159069699. The cubic root of 865525568 is about 953.0008775505. Note that the first 3 decimals are identical.

The spelling of 865525568 in words is "eight hundred sixty-five million, five hundred twenty-five thousand, five hundred sixty-eight".