5518558369 has 3 divisors (see below), whose sum is σ = 5518632657. Its totient is φ = 5518484082.

The previous prime is 5518558363. The next prime is 5518558373. The reversal of 5518558369 is 9638558155.

The square root of 5518558369 is 74287.

It is a perfect power (a square), and thus also a powerful number.

5518558369 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 5518558369 - 2³ = 5518558361 is a prime.

It is a super-2 number, since 2×5518558369² = 60908972944119880322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5518558361) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 37144 + ... + 111430.

It is an arithmetic number, because the mean of its divisors is an integer number (1839544219).

Almost surely, 2^5518558369 is an apocalyptic number.

5518558369 is the 74287-th square number.

5518558369 is the 37144-th centered octagonal number.

It is an amenable number.

5518558369 is a deficient number, since it is larger than the sum of its proper divisors (74288).

5518558369 is an frugal number, since it uses more digits than its factorization.

5518558369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148574 (or 74287 counting only the distinct ones).

The product of its digits is 6480000, while the sum is 55.

The cubic root of 5518558369 is about 1767.1573177886.

The spelling of 5518558369 in words is "five billion, five hundred eighteen million, five hundred fifty-eight thousand, three hundred sixty-nine".