8718516818 has 36 divisors (see below), whose sum is σ = 14853800430. Its totient is φ = 3835022400.

The previous prime is 8718516817. The next prime is 8718516847. The reversal of 8718516818 is 8186158178.

It can be written as a sum of positive squares in only one way, i.e., 5475556009 + 3242960809 = 73997^2 + 56947^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8718516818.

It is not an unprimeable number, because it can be changed into a prime (8718516817) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 213818 + ... + 251306.

Almost surely, 2^8718516818 is an apocalyptic number.

8718516818 is a deficient number, since it is larger than the sum of its proper divisors (6135283612).

8718516818 is a wasteful number, since it uses less digits than its factorization.

8718516818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37575 (or 37533 counting only the distinct ones).

The product of its digits is 860160, while the sum is 53.

The square root of 8718516818 is about 93372.9983346363. The cubic root of 8718516818 is about 2058.1682288516.

The spelling of 8718516818 in words is "eight billion, seven hundred eighteen million, five hundred sixteen thousand, eight hundred eighteen".