872865785873 has 4 divisors (see below), whose sum is σ = 873069302820. Its totient is φ = 872662268928.

The previous prime is 872865785809. The next prime is 872865785881. The reversal of 872865785873 is 378587568278.

872865785873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 515821294849 + 357044491024 = 718207^2 + 597532^2 .

It is a cyclic number.

It is not a de Polignac number, because 872865785873 - 2⁶ = 872865785809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 872865785873.

It is not an unprimeable number, because it can be changed into a prime (872865787873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101752040 + ... + 101760617.

It is an arithmetic number, because the mean of its divisors is an integer number (218267325705).

Almost surely, 2^872865785873 is an apocalyptic number.

It is an amenable number.

872865785873 is a deficient number, since it is larger than the sum of its proper divisors (203516947).

872865785873 is a wasteful number, since it uses less digits than its factorization.

872865785873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203516946.

The product of its digits is 1264435200, while the sum is 74.

The spelling of 872865785873 in words is "eight hundred seventy-two billion, eight hundred sixty-five million, seven hundred eighty-five thousand, eight hundred seventy-three".