6555804918 has 64 divisors (see below), whose sum is σ = 14631321600. Its totient is φ = 1944650880.

The previous prime is 6555804889. The next prime is 6555804947. The reversal of 6555804918 is 8194085556.

It is an interprime number because it is at equal distance from previous prime (6555804889) and next prime (6555804947).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 645403 + ... + 655481.

It is an arithmetic number, because the mean of its divisors is an integer number (228614400).

Almost surely, 2^6555804918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6555804918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7315660800).

6555804918 is an abundant number, since it is smaller than the sum of its proper divisors (8075516682).

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

6555804918 is a wasteful number, since it uses less digits than its factorization.

6555804918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10397.

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

The square root of 6555804918 is about 80967.9252420364. The cubic root of 6555804918 is about 1871.5811993454.

The spelling of 6555804918 in words is "six billion, five hundred fifty-five million, eight hundred four thousand, nine hundred eighteen".