6544223752 has 64 divisors (see below), whose sum is σ = 14294361600. Its totient is φ = 2779392000.

The previous prime is 6544223747. The next prime is 6544223753. The reversal of 6544223752 is 2573224456.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6544223753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37752 + ... + 120472.

It is an arithmetic number, because the mean of its divisors is an integer number (223349400).

Almost surely, 2^6544223752 is an apocalyptic number.

6544223752 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6544223752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7147180800).

6544223752 is an abundant number, since it is smaller than the sum of its proper divisors (7750137848).

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

6544223752 is a wasteful number, since it uses less digits than its factorization.

6544223752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82798 (or 82794 counting only the distinct ones).

The product of its digits is 403200, while the sum is 40.

The square root of 6544223752 is about 80896.3766308479. The cubic root of 6544223752 is about 1870.4784683179.

The spelling of 6544223752 in words is "six billion, five hundred forty-four million, two hundred twenty-three thousand, seven hundred fifty-two".