26485965817 has 2 divisors, whose sum is σ = 26485965818. Its totient is φ = 26485965816.

The previous prime is 26485965773. The next prime is 26485965823. The reversal of 26485965817 is 71856958462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25829632656 + 656333161 = 160716^2 + 25619^2 .

It is a cyclic number.

It is not a de Polignac number, because 26485965817 - 2⁷ = 26485965689 is a prime.

It is not a weakly prime, because it can be changed into another prime (26485965217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13242982908 + 13242982909.

It is an arithmetic number, because the mean of its divisors is an integer number (13242982909).

Almost surely, 2^26485965817 is an apocalyptic number.

It is an amenable number.

26485965817 is a deficient number, since it is larger than the sum of its proper divisors (1).

26485965817 is an equidigital number, since it uses as much as digits as its factorization.

26485965817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 61.

The spelling of 26485965817 in words is "twenty-six billion, four hundred eighty-five million, nine hundred sixty-five thousand, eight hundred seventeen".