26908996409 has 2 divisors, whose sum is σ = 26908996410. Its totient is φ = 26908996408.

The previous prime is 26908996403. The next prime is 26908996421. The reversal of 26908996409 is 90469980962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13472709184 + 13436287225 = 116072^2 + 115915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26908996409 is a prime.

It is not a weakly prime, because it can be changed into another prime (26908996403) by changing a digit.

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 as a sum of consecutive naturals, namely, 13454498204 + 13454498205.

It is an arithmetic number, because the mean of its divisors is an integer number (13454498205).

Almost surely, 2^26908996409 is an apocalyptic number.

It is an amenable number.

26908996409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26908996409 is an equidigital number, since it uses as much as digits as its factorization.

26908996409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15116544, while the sum is 62.

The spelling of 26908996409 in words is "twenty-six billion, nine hundred eight million, nine hundred ninety-six thousand, four hundred nine".