4644661218 has 16 divisors (see below), whose sum is σ = 9337959936. Its totient is φ = 1540114160.

The previous prime is 4644661183. The next prime is 4644661223. The reversal of 4644661218 is 8121664464.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 4644661218.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025321 + ... + 2027612.

It is an arithmetic number, because the mean of its divisors is an integer number (583622496).

Almost surely, 2^4644661218 is an apocalyptic number.

4644661218 is an abundant number, since it is smaller than the sum of its proper divisors (4693298718).

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

4644661218 is a wasteful number, since it uses less digits than its factorization.

4644661218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053129.

The product of its digits is 221184, while the sum is 42.

The square root of 4644661218 is about 68151.7513934895. The cubic root of 4644661218 is about 1668.4685085885.

The spelling of 4644661218 in words is "four billion, six hundred forty-four million, six hundred sixty-one thousand, two hundred eighteen".