872285857865 has 8 divisors (see below), whose sum is σ = 1082837616840. Its totient is φ = 673765628032.

The previous prime is 872285857847. The next prime is 872285857871. The reversal of 872285857865 is 568758582278.

It can be written as a sum of positive squares in 4 ways, for example, as 39198852169 + 833087005696 = 197987^2 + 912736^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 872285857865 - 2⁶ = 872285857801 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3007882124 + ... + 3007882413.

It is an arithmetic number, because the mean of its divisors is an integer number (135354702105).

Almost surely, 2^872285857865 is an apocalyptic number.

It is an amenable number.

872285857865 is a deficient number, since it is larger than the sum of its proper divisors (210551758975).

872285857865 is a wasteful number, since it uses less digits than its factorization.

872285857865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015764571.

The product of its digits is 602112000, while the sum is 71.

The spelling of 872285857865 in words is "eight hundred seventy-two billion, two hundred eighty-five million, eight hundred fifty-seven thousand, eight hundred sixty-five".