8181551124468 has 72 divisors (see below), whose sum is σ = 22489510227912. Its totient is φ = 2497389207552.

The previous prime is 8181551124449. The next prime is 8181551124491. The reversal of 8181551124468 is 8644211551818.

8181551124468 is a `hidden beast` number, since 8 + 1 + 8 + 1 + 5 + 51 + 124 + 468 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5567580023184 + 2613971101284 = 2359572^2 + 1616778^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180633405 + ... + 180678692.

It is an arithmetic number, because the mean of its divisors is an integer number (312354308721).

Almost surely, 2^{8181551124468} is an apocalyptic number.

It is an amenable number.

8181551124468 is an abundant number, since it is smaller than the sum of its proper divisors (14307959103444).

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

8181551124468 is a wasteful number, since it uses less digits than its factorization.

8181551124468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361312161 (or 361312156 counting only the distinct ones).

The product of its digits is 2457600, while the sum is 54.

The spelling of 8181551124468 in words is "eight trillion, one hundred eighty-one billion, five hundred fifty-one million, one hundred twenty-four thousand, four hundred sixty-eight".