865472723858 has 6 divisors (see below), whose sum is σ = 1298211059271. Its totient is φ = 432735704102.

The previous prime is 865472723833. The next prime is 865472723873. The reversal of 865472723858 is 858327274568.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 432736361929 + 432736361929 = 657827^2 + 657827^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=657827.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 865472723794 and 865472723803.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 986741 + ... + 1644567.

Almost surely, 2^865472723858 is an apocalyptic number.

865472723858 is a deficient number, since it is larger than the sum of its proper divisors (432738335413).

865472723858 is an frugal number, since it uses more digits than its factorization.

865472723858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315656 (or 657829 counting only the distinct ones).

The product of its digits is 180633600, while the sum is 65.

The spelling of 865472723858 in words is "eight hundred sixty-five billion, four hundred seventy-two million, seven hundred twenty-three thousand, eight hundred fifty-eight".