8185817864860 has 48 divisors (see below), whose sum is σ = 17290119168000. Its totient is φ = 3255324012864.

The previous prime is 8185817864849. The next prime is 8185817864879. The reversal of 8185817864860 is 684687185818.

It is a super-2 number, since 2×8185817864860² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8185817864860.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4286379 + ... + 5894461.

It is an arithmetic number, because the mean of its divisors is an integer number (360210816000).

Almost surely, 2^{8185817864860} is an apocalyptic number.

It is an amenable number.

8185817864860 is an abundant number, since it is smaller than the sum of its proper divisors (9104301303140).

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

8185817864860 is a wasteful number, since it uses less digits than its factorization.

8185817864860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609570 (or 1609568 counting only the distinct ones).

The product of its (nonzero) digits is 165150720, while the sum is 70.

The spelling of 8185817864860 in words is "eight trillion, one hundred eighty-five billion, eight hundred seventeen million, eight hundred sixty-four thousand, eight hundred sixty".