8191773862188 has 144 divisors (see below), whose sum is σ = 22965339091968. Its totient is φ = 2263696848000.

The previous prime is 8191773862187. The next prime is 8191773862229. The reversal of 8191773862188 is 8812683771918.

It is a happy number.

It is a super-2 number, since 2×8191773862188² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8191773862187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31605883 + ... + 31864013.

It is an arithmetic number, because the mean of its divisors is an integer number (159481521472).

Almost surely, 2^{8191773862188} 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 8191773862188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11482669545984).

8191773862188 is an abundant number, since it is smaller than the sum of its proper divisors (14773565229780).

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

8191773862188 is a wasteful number, since it uses less digits than its factorization.

8191773862188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259924 (or 259915 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 69.

The spelling of 8191773862188 in words is "eight trillion, one hundred ninety-one billion, seven hundred seventy-three million, eight hundred sixty-two thousand, one hundred eighty-eight".