6544444444456 has 8 divisors (see below), whose sum is σ = 12270833333370. Its totient is φ = 3272222222224.

The previous prime is 6544444444453. The next prime is 6544444444459.

6544444444456 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (6544444444453) and next prime (6544444444459).

It can be written as a sum of positive squares in only one way, i.e., 6537563741956 + 6880702500 = 2556866^2 + 82950^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 6544444444456.

It is not an unprimeable number, because it can be changed into a prime (6544444444453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409027777771 + ... + 409027777786.

Almost surely, 2^{6544444444456} is an apocalyptic number.

It is an amenable number.

6544444444456 is a deficient number, since it is larger than the sum of its proper divisors (5726388888914).

6544444444456 is a wasteful number, since it uses less digits than its factorization.

6544444444456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818055555563 (or 818055555559 counting only the distinct ones).

The product of its digits is 235929600, while the sum is 58.

The spelling of 6544444444456 in words is "six trillion, five hundred forty-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred fifty-six".