818187195852 has 120 divisors (see below), whose sum is σ = 2304100848896. Its totient is φ = 251677020672.

The previous prime is 818187195827. The next prime is 818187195857. The reversal of 818187195852 is 258591781818.

It is a self number, because there is not a number n which added to its sum of digits gives 818187195852.

It is not an unprimeable number, because it can be changed into a prime (818187195857) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15545493 + ... + 15598035.

Almost surely, 2^818187195852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818187195852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152050424448).

818187195852 is an abundant number, since it is smaller than the sum of its proper divisors (1485913653044).

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

818187195852 is a wasteful number, since it uses less digits than its factorization.

818187195852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56269 (or 56258 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 63.

The spelling of 818187195852 in words is "eight hundred eighteen billion, one hundred eighty-seven million, one hundred ninety-five thousand, eight hundred fifty-two".