26182591009 has 2 divisors, whose sum is σ = 26182591010. Its totient is φ = 26182591008.

The previous prime is 26182590997. The next prime is 26182591031. The reversal of 26182591009 is 90019528162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19584603025 + 6597987984 = 139945^2 + 81228^2 .

It is a cyclic number.

It is not a de Polignac number, because 26182591009 - 2¹⁷ = 26182459937 is a prime.

It is not a weakly prime, because it can be changed into another prime (26182591049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13091295504 + 13091295505.

It is an arithmetic number, because the mean of its divisors is an integer number (13091295505).

Almost surely, 2^26182591009 is an apocalyptic number.

It is an amenable number.

26182591009 is a deficient number, since it is larger than the sum of its proper divisors (1).

26182591009 is an equidigital number, since it uses as much as digits as its factorization.

26182591009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 26182591009 in words is "twenty-six billion, one hundred eighty-two million, five hundred ninety-one thousand, nine".