5518351813 has 8 divisors (see below), whose sum is σ = 5988207456. Its totient is φ = 5054977200.

The previous prime is 5518351777. The next prime is 5518351837. The reversal of 5518351813 is 3181538155.

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

It is not a de Polignac number, because 5518351813 - 2⁹ = 5518351301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5518351873) 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, 1618483 + ... + 1621888.

It is an arithmetic number, because the mean of its divisors is an integer number (748525932).

Almost surely, 2^5518351813 is an apocalyptic number.

It is an amenable number.

5518351813 is a deficient number, since it is larger than the sum of its proper divisors (469855643).

5518351813 is a wasteful number, since it uses less digits than its factorization.

5518351813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3240515.

The product of its digits is 72000, while the sum is 40.

The square root of 5518351813 is about 74285.6097302836. The cubic root of 5518351813 is about 1767.1352696692.

Adding to 5518351813 its reverse (3181538155), we get a palindrome (8699889968).

The spelling of 5518351813 in words is "five billion, five hundred eighteen million, three hundred fifty-one thousand, eight hundred thirteen".