8516778218 has 32 divisors (see below), whose sum is σ = 14922487440. Its totient is φ = 3609354240.

The previous prime is 8516778197. The next prime is 8516778227. The reversal of 8516778218 is 8128776158.

It can be written as a sum of positive squares in 8 ways, for example, as 3713317969 + 4803460249 = 60937^2 + 69307^2 .

It is a super-2 number, since 2×8516778218² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8516778218.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216863 + ... + 253106.

Almost surely, 2^8516778218 is an apocalyptic number.

8516778218 is a deficient number, since it is larger than the sum of its proper divisors (6405709222).

8516778218 is a wasteful number, since it uses less digits than its factorization.

8516778218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470042.

The product of its digits is 1505280, while the sum is 53.

The square root of 8516778218 is about 92286.3923772080. The cubic root of 8516778218 is about 2042.1694703469.

The spelling of 8516778218 in words is "eight billion, five hundred sixteen million, seven hundred seventy-eight thousand, two hundred eighteen".