5518668155 has 64 divisors (see below), whose sum is σ = 8926848000. Its totient is φ = 3163000320.

The previous prime is 5518668151. The next prime is 5518668217.

It is a happy number.

5518668155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5518668155 - 2² = 5518668151 is a prime.

It is a super-2 number, since 2×5518668155² = 60911396410022208050, which contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 1344296 + ... + 1348394.

It is an arithmetic number, because the mean of its divisors is an integer number (139482000).

Almost surely, 2^5518668155 is an apocalyptic number.

5518668155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

5518668155 is a deficient number, since it is larger than the sum of its proper divisors (3408179845).

5518668155 is a wasteful number, since it uses less digits than its factorization.

5518668155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4404.

The product of its digits is 1440000, while the sum is 50.

The square root of 5518668155 is about 74287.7389277665. The cubic root of 5518668155 is about 1767.1690362987.

The spelling of 5518668155 in words is "five billion, five hundred eighteen million, six hundred sixty-eight thousand, one hundred fifty-five".