8268215865172 has 24 divisors (see below), whose sum is σ = 14936677281792. Its totient is φ = 4000603524000.

The previous prime is 8268215865137. The next prime is 8268215865229. The reversal of 8268215865172 is 2715685128628.

It is a self number, because there is not a number n which added to its sum of digits gives 8268215865172.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2231373 + ... + 4638475.

It is an arithmetic number, because the mean of its divisors is an integer number (622361553408).

Almost surely, 2^{8268215865172} is an apocalyptic number.

It is an amenable number.

8268215865172 is a deficient number, since it is larger than the sum of its proper divisors (6668461416620).

8268215865172 is a wasteful number, since it uses less digits than its factorization.

8268215865172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2434839 (or 2434837 counting only the distinct ones).

The product of its digits is 25804800, while the sum is 61.

The spelling of 8268215865172 in words is "eight trillion, two hundred sixty-eight billion, two hundred fifteen million, eight hundred sixty-five thousand, one hundred seventy-two".