26276138909 has 2 divisors, whose sum is σ = 26276138910. Its totient is φ = 26276138908.

The previous prime is 26276138879. The next prime is 26276138923. The reversal of 26276138909 is 90983167262.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25337635684 + 938503225 = 159178^2 + 30635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26276138909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26276138209) 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, 13138069454 + 13138069455.

It is an arithmetic number, because the mean of its divisors is an integer number (13138069455).

Almost surely, 2^26276138909 is an apocalyptic number.

It is an amenable number.

26276138909 is a deficient number, since it is larger than the sum of its proper divisors (1).

26276138909 is an equidigital number, since it uses as much as digits as its factorization.

26276138909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 26276138909 in words is "twenty-six billion, two hundred seventy-six million, one hundred thirty-eight thousand, nine hundred nine".