5518887289 has 4 divisors (see below), whose sum is σ = 5519040100. Its totient is φ = 5518734480.

The previous prime is 5518887271. The next prime is 5518887347. The reversal of 5518887289 is 9827888155.

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 can be written as a sum of positive squares in 2 ways, for example, as 4106630889 + 1412256400 = 64083^2 + 37580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5518887289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5518887229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11419 + ... + 105679.

It is an arithmetic number, because the mean of its divisors is an integer number (1379760025).

Almost surely, 2^5518887289 is an apocalyptic number.

It is an amenable number.

5518887289 is a deficient number, since it is larger than the sum of its proper divisors (152811).

5518887289 is an equidigital number, since it uses as much as digits as its factorization.

5518887289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152810.

The product of its digits is 12902400, while the sum is 61.

The square root of 5518887289 is about 74289.2138133121. The cubic root of 5518887289 is about 1767.1924261024.

The spelling of 5518887289 in words is "five billion, five hundred eighteen million, eight hundred eighty-seven thousand, two hundred eighty-nine".