5518388720 has 40 divisors (see below), whose sum is σ = 13817198976. Its totient is φ = 2037558528.

The previous prime is 5518388719. The next prime is 5518388741. The reversal of 5518388720 is 278838155.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×5518388720² = 60905228130046476800, 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, 2652032 + ... + 2654111.

Almost surely, 2^5518388720 is an apocalyptic number.

It is an amenable number.

5518388720 is an abundant number, since it is smaller than the sum of its proper divisors (8298810256).

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

5518388720 is a wasteful number, since it uses less digits than its factorization.

5518388720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306169 (or 5306163 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 47.

The square root of 5518388720 is about 74285.8581427179. The cubic root of 5518388720 is about 1767.1392092221.

The spelling of 5518388720 in words is "five billion, five hundred eighteen million, three hundred eighty-eight thousand, seven hundred twenty".