8161366868 has 24 divisors (see below), whose sum is σ = 15378854400. Its totient is φ = 3775545728.

The previous prime is 8161366867. The next prime is 8161366937. The reversal of 8161366868 is 8686631618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161366867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1013108 + ... + 1021131.

It is an arithmetic number, because the mean of its divisors is an integer number (640785600).

Almost surely, 2^8161366868 is an apocalyptic number.

It is an amenable number.

8161366868 is a deficient number, since it is larger than the sum of its proper divisors (7217487532).

8161366868 is a wasteful number, since it uses less digits than its factorization.

8161366868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034319 (or 2034317 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The square root of 8161366868 is about 90340.2837498311. The cubic root of 8161366868 is about 2013.3578246391.

The spelling of 8161366868 in words is "eight billion, one hundred sixty-one million, three hundred sixty-six thousand, eight hundred sixty-eight".