865587359172 has 48 divisors (see below), whose sum is σ = 2054476714752. Its totient is φ = 283581012000.

The previous prime is 865587359171. The next prime is 865587359179. The reversal of 865587359172 is 271953785568.

It is not an unprimeable number, because it can be changed into a prime (865587359171) 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, 858954 + ... + 1571297.

It is an arithmetic number, because the mean of its divisors is an integer number (42801598224).

Almost surely, 2^865587359172 is an apocalyptic number.

It is an amenable number.

865587359172 is an abundant number, since it is smaller than the sum of its proper divisors (1188889355580).

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

865587359172 is a wasteful number, since it uses less digits than its factorization.

865587359172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430768 (or 2430766 counting only the distinct ones).

The product of its digits is 127008000, while the sum is 66.

The spelling of 865587359172 in words is "eight hundred sixty-five billion, five hundred eighty-seven million, three hundred fifty-nine thousand, one hundred seventy-two".