26344664065543 has 4 divisors (see below), whose sum is σ = 26442599619960. Its totient is φ = 26246728511128.

The previous prime is 26344664065493. The next prime is 26344664065553. The reversal of 26344664065543 is 34556046644362.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26344664065543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26344664065553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48967776805 + ... + 48967777342.

It is an arithmetic number, because the mean of its divisors is an integer number (6610649904990).

Almost surely, 2^{26344664065543} is an apocalyptic number.

26344664065543 is a deficient number, since it is larger than the sum of its proper divisors (97935554417).

26344664065543 is an equidigital number, since it uses as much as digits as its factorization.

26344664065543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97935554416.

The product of its (nonzero) digits is 149299200, while the sum is 58.

The spelling of 26344664065543 in words is "twenty-six trillion, three hundred forty-four billion, six hundred sixty-four million, sixty-five thousand, five hundred forty-three".