6551311872 has 160 divisors (see below), whose sum is σ = 20996870400. Its totient is φ = 1773232128.

The previous prime is 6551311859. The next prime is 6551311901. The reversal of 6551311872 is 2781131556.

It is a super-3 number, since 3×6551311872³ (a number of 30 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6551311872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188254 + ... + 220322.

It is an arithmetic number, because the mean of its divisors is an integer number (131230440).

Almost surely, 2^6551311872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6551311872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10498435200).

6551311872 is an abundant number, since it is smaller than the sum of its proper divisors (14445558528).

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

6551311872 is a wasteful number, since it uses less digits than its factorization.

6551311872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32116 (or 32100 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 6551311872 is about 80940.1746476989. The cubic root of 6551311872 is about 1871.1535365169.

The spelling of 6551311872 in words is "six billion, five hundred fifty-one million, three hundred eleven thousand, eight hundred seventy-two".