865373772168 has 48 divisors (see below), whose sum is σ = 2445621534720. Its totient is φ = 275916274656.

The previous prime is 865373772157. The next prime is 865373772223. The reversal of 865373772168 is 861277373568.

865373772168 is a `hidden beast` number, since 8 + 6 + 537 + 3 + 77 + 21 + 6 + 8 = 666.

865373772168 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261282696 + ... + 261286007.

It is an arithmetic number, because the mean of its divisors is an integer number (50950448640).

Almost surely, 2^865373772168 is an apocalyptic number.

It is an amenable number.

865373772168 is an abundant number, since it is smaller than the sum of its proper divisors (1580247762552).

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

865373772168 is a wasteful number, since it uses less digits than its factorization.

865373772168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522568738 (or 522568731 counting only the distinct ones).

The product of its digits is 71124480, while the sum is 63.

The spelling of 865373772168 in words is "eight hundred sixty-five billion, three hundred seventy-three million, seven hundred seventy-two thousand, one hundred sixty-eight".