865251168 has 96 divisors (see below), whose sum is σ = 2446682112. Its totient is φ = 266956800.

The previous prime is 865251151. The next prime is 865251169. The reversal of 865251168 is 861152568.

865251168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×865251168³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865251169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62128 + ... + 74768.

It is an arithmetic number, because the mean of its divisors is an integer number (25486272).

Almost surely, 2^865251168 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 865251168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1223341056).

865251168 is an abundant number, since it is smaller than the sum of its proper divisors (1581430944).

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

865251168 is a wasteful number, since it uses less digits than its factorization.

865251168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12708 (or 12700 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 865251168 is about 29415.1520138856. The cubic root of 865251168 is about 952.9001560581.

The spelling of 865251168 in words is "eight hundred sixty-five million, two hundred fifty-one thousand, one hundred sixty-eight".