5218779918 has 96 divisors (see below), whose sum is σ = 12143053440. Its totient is φ = 1482595840.

The previous prime is 5218779869. The next prime is 5218779931. The reversal of 5218779918 is 8199778125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7991680 + ... + 7992332.

It is an arithmetic number, because the mean of its divisors is an integer number (126490140).

Almost surely, 2^5218779918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5218779918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6071526720).

5218779918 is an abundant number, since it is smaller than the sum of its proper divisors (6924273522).

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

5218779918 is a wasteful number, since it uses less digits than its factorization.

5218779918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122 (or 1105 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 57.

The square root of 5218779918 is about 72241.1234547193. The cubic root of 5218779918 is about 1734.5613330668.

The spelling of 5218779918 in words is "five billion, two hundred eighteen million, seven hundred seventy-nine thousand, nine hundred eighteen".