5518668156 has 12 divisors (see below), whose sum is σ = 12876892392. Its totient is φ = 1839556048.

The previous prime is 5518668151. The next prime is 5518668217. The reversal of 5518668156 is 6518668155.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 5518668099 and 5518668108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5518668151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229944495 + ... + 229944518.

It is an arithmetic number, because the mean of its divisors is an integer number (1073074366).

Almost surely, 2^5518668156 is an apocalyptic number.

It is an amenable number.

5518668156 is an abundant number, since it is smaller than the sum of its proper divisors (7358224236).

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

5518668156 is a wasteful number, since it uses less digits than its factorization.

5518668156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459889020 (or 459889018 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 51.

The square root of 5518668156 is about 74287.7389344971. The cubic root of 5518668156 is about 1767.1690364055.

Subtracting 5518668156 from its reverse (6518668155), we obtain a palindrome (999999999).

The spelling of 5518668156 in words is "five billion, five hundred eighteen million, six hundred sixty-eight thousand, one hundred fifty-six".