8221185511868 has 12 divisors (see below), whose sum is σ = 16442371023792. Its totient is φ = 3523365219360.

The previous prime is 8221185511867. The next prime is 8221185511919. The reversal of 8221185511868 is 8681155811228.

8221185511868 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8221185511867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146806884113 + ... + 146806884168.

It is an arithmetic number, because the mean of its divisors is an integer number (1370197585316).

Almost surely, 2^{8221185511868} is an apocalyptic number.

It is an amenable number.

8221185511868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8221185511868 is a wasteful number, since it uses less digits than its factorization.

8221185511868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293613768292 (or 293613768290 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 56.

The spelling of 8221185511868 in words is "eight trillion, two hundred twenty-one billion, one hundred eighty-five million, five hundred eleven thousand, eight hundred sixty-eight".