5515511689 has 4 divisors (see below), whose sum is σ = 5515662100. Its totient is φ = 5515361280.

The previous prime is 5515511681. The next prime is 5515511707. The reversal of 5515511689 is 9861155155.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9861155155 = 5 ⋅1972231031.

It can be written as a sum of positive squares in 2 ways, for example, as 3066944400 + 2448567289 = 55380^2 + 49483^2 .

It is a cyclic number.

It is not a de Polignac number, because 5515511689 - 2³ = 5515511681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5515511681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19837 + ... + 106885.

It is an arithmetic number, because the mean of its divisors is an integer number (1378915525).

Almost surely, 2^5515511689 is an apocalyptic number.

It is an amenable number.

5515511689 is a deficient number, since it is larger than the sum of its proper divisors (150411).

5515511689 is an equidigital number, since it uses as much as digits as its factorization.

5515511689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150410.

The product of its digits is 270000, while the sum is 46.

The square root of 5515511689 is about 74266.4910238797. The cubic root of 5515511689 is about 1766.8320544624.

The spelling of 5515511689 in words is "five billion, five hundred fifteen million, five hundred eleven thousand, six hundred eighty-nine".