26444640040205 has 8 divisors (see below), whose sum is σ = 31733599488792. Its totient is φ = 21155691071808.

The previous prime is 26444640040157. The next prime is 26444640040277. The reversal of 26444640040205 is 50204004644462.

It can be written as a sum of positive squares in 4 ways, for example, as 8477053525444 + 17967586514761 = 2911538^2 + 4238819^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26444640040205 - 2¹² = 26444640036109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4886207 + ... + 8761523.

It is an arithmetic number, because the mean of its divisors is an integer number (3966699936099).

Almost surely, 2^{26444640040205} is an apocalyptic number.

It is an amenable number.

26444640040205 is a deficient number, since it is larger than the sum of its proper divisors (5288959448587).

26444640040205 is a wasteful number, since it uses less digits than its factorization.

26444640040205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5240095.

The product of its (nonzero) digits is 737280, while the sum is 41.

Adding to 26444640040205 its reverse (50204004644462), we get a palindrome (76648644684667).

The spelling of 26444640040205 in words is "twenty-six trillion, four hundred forty-four billion, six hundred forty million, forty thousand, two hundred five".