8649672218 has 16 divisors (see below), whose sum is σ = 14181194880. Its totient is φ = 3924117600.

The previous prime is 8649672217. The next prime is 8649672289. The reversal of 8649672218 is 8122769468.

It is a self number, because there is not a number n which added to its sum of digits gives 8649672218.

It is not an unprimeable number, because it can be changed into a prime (8649672217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365858 + ... + 388781.

It is an arithmetic number, because the mean of its divisors is an integer number (886324680).

Almost surely, 2^8649672218 is an apocalyptic number.

8649672218 is a deficient number, since it is larger than the sum of its proper divisors (5531522662).

8649672218 is a wasteful number, since it uses less digits than its factorization.

8649672218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755173.

The product of its digits is 2322432, while the sum is 53.

The square root of 8649672218 is about 93003.6140050482. The cubic root of 8649672218 is about 2052.7365569488.

The spelling of 8649672218 in words is "eight billion, six hundred forty-nine million, six hundred seventy-two thousand, two hundred eighteen".