26604824808857 has 2 divisors, whose sum is σ = 26604824808858. Its totient is φ = 26604824808856.

The previous prime is 26604824808847. The next prime is 26604824808869. The reversal of 26604824808857 is 75880842840662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26154182461456 + 450642347401 = 5114116^2 + 671299^2 .

It is a cyclic number.

It is not a de Polignac number, because 26604824808857 - 2¹⁰ = 26604824807833 is a prime.

It is not a weakly prime, because it can be changed into another prime (26604824808827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13302412404428 + 13302412404429.

It is an arithmetic number, because the mean of its divisors is an integer number (13302412404429).

Almost surely, 2^{26604824808857} is an apocalyptic number.

It is an amenable number.

26604824808857 is a deficient number, since it is larger than the sum of its proper divisors (1).

26604824808857 is an equidigital number, since it uses as much as digits as its factorization.

26604824808857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 330301440, while the sum is 68.

The spelling of 26604824808857 in words is "twenty-six trillion, six hundred four billion, eight hundred twenty-four million, eight hundred eight thousand, eight hundred fifty-seven".