4649381218 has 8 divisors (see below), whose sum is σ = 6975585900. Its totient is φ = 2324185920.

The previous prime is 4649381213. The next prime is 4649381251. The reversal of 4649381218 is 8121839464.

It can be written as a sum of positive squares in 2 ways, for example, as 3443694489 + 1205686729 = 58683^2 + 34723^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (4649381213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240723 + ... + 259318.

Almost surely, 2^4649381218 is an apocalyptic number.

4649381218 is a deficient number, since it is larger than the sum of its proper divisors (2326204682).

4649381218 is a wasteful number, since it uses less digits than its factorization.

4649381218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504692.

The product of its digits is 331776, while the sum is 46.

The square root of 4649381218 is about 68186.3712042223. The cubic root of 4649381218 is about 1669.0334945555.

The spelling of 4649381218 in words is "four billion, six hundred forty-nine million, three hundred eighty-one thousand, two hundred eighteen".