6544422720 has 336 divisors, whose sum is σ = 24723474048. Its totient is φ = 1575751680.

The previous prime is 6544422713. The next prime is 6544422727. The reversal of 6544422720 is 272244456.

6544422720 is a `hidden beast` number, since 6 + 544 + 42 + 2 + 72 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (6544422713) and next prime (6544422727).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544422727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5289942 + ... + 5291178.

It is an arithmetic number, because the mean of its divisors is an integer number (73581768).

Almost surely, 2^6544422720 is an apocalyptic number.

6544422720 is a gapful number since it is divisible by the number (60) 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 6544422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12361737024).

6544422720 is an abundant number, since it is smaller than the sum of its proper divisors (18179051328).

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

6544422720 is a wasteful number, since it uses less digits than its factorization.

6544422720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438 (or 1425 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

The square root of 6544422720 is about 80897.6063922784. The cubic root of 6544422720 is about 1870.4974245558.

The spelling of 6544422720 in words is "six billion, five hundred forty-four million, four hundred twenty-two thousand, seven hundred twenty".