5518128820 has 24 divisors (see below), whose sum is σ = 11611885824. Its totient is φ = 2202715296.

The previous prime is 5518128817. The next prime is 5518128841. The reversal of 5518128820 is 288218155.

It is a super-2 number, since 2×5518128820² = 60899491348229184800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273532 + ... + 293011.

It is an arithmetic number, because the mean of its divisors is an integer number (483828576).

Almost surely, 2^5518128820 is an apocalyptic number.

It is an amenable number.

5518128820 is an abundant number, since it is smaller than the sum of its proper divisors (6093757004).

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

5518128820 is a wasteful number, since it uses less digits than its factorization.

5518128820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567039 (or 567037 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 40.

The square root of 5518128820 is about 74284.1087985849. The cubic root of 5518128820 is about 1767.1114664204. Note that the first 3 decimals are identical.

The spelling of 5518128820 in words is "five billion, five hundred eighteen million, one hundred twenty-eight thousand, eight hundred twenty".