6544400044456 has 8 divisors (see below), whose sum is σ = 12270750083370. Its totient is φ = 3272200022224.

The previous prime is 6544400044393. The next prime is 6544400044459.

6544400044456 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 5238101916100 + 1306298128356 = 2288690^2 + 1142934^2 .

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

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6544400044459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409025002771 + ... + 409025002786.

Almost surely, 2^{6544400044456} is an apocalyptic number.

It is an amenable number.

6544400044456 is a deficient number, since it is larger than the sum of its proper divisors (5726350038914).

6544400044456 is a wasteful number, since it uses less digits than its factorization.

6544400044456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818050005563 (or 818050005559 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 46.

It can be divided in two parts, 65444000 and 44456, that added together give a palindrome (65488456).

The spelling of 6544400044456 in words is "six trillion, five hundred forty-four billion, four hundred million, forty-four thousand, four hundred fifty-six".