6544994456 has 128 divisors (see below), whose sum is σ = 17045683200. Its totient is φ = 2272596480.

The previous prime is 6544994453. The next prime is 6544994459.

6544994456 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6544994453) and next prime (6544994459).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544994453) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 218141 + ... + 246323.

It is an arithmetic number, because the mean of its divisors is an integer number (133169400).

Almost surely, 2^6544994456 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 6544994456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8522841600).

6544994456 is an abundant number, since it is smaller than the sum of its proper divisors (10500688744).

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

6544994456 is a wasteful number, since it uses less digits than its factorization.

6544994456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28249 (or 28245 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 56.

The square root of 6544994456 is about 80901.1400166895. The cubic root of 6544994456 is about 1870.5518933058.

The spelling of 6544994456 in words is "six billion, five hundred forty-four million, nine hundred ninety-four thousand, four hundred fifty-six".