26544454561 has 8 divisors (see below), whose sum is σ = 27387511200. Its totient is φ = 25710713760.

The previous prime is 26544454513. The next prime is 26544454613. The reversal of 26544454561 is 16545444562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26544454561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26544454511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2323171 + ... + 2334568.

It is an arithmetic number, because the mean of its divisors is an integer number (3423438900).

Almost surely, 2^26544454561 is an apocalyptic number.

It is an amenable number.

26544454561 is a deficient number, since it is larger than the sum of its proper divisors (843056639).

26544454561 is a wasteful number, since it uses less digits than its factorization.

26544454561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4657919.

The product of its digits is 2304000, while the sum is 46.

Subtracting from 26544454561 its reverse (16545444562), we obtain a palindrome (9999009999).

The spelling of 26544454561 in words is "twenty-six billion, five hundred forty-four million, four hundred fifty-four thousand, five hundred sixty-one".