26715009889 has 2 divisors, whose sum is σ = 26715009890. Its totient is φ = 26715009888.

The previous prime is 26715009859. The next prime is 26715009901. The reversal of 26715009889 is 98890051762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22891690000 + 3823319889 = 151300^2 + 61833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26715009889 is a prime.

It is not a weakly prime, because it can be changed into another prime (26715009809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13357504944 + 13357504945.

It is an arithmetic number, because the mean of its divisors is an integer number (13357504945).

Almost surely, 2^26715009889 is an apocalyptic number.

It is an amenable number.

26715009889 is a deficient number, since it is larger than the sum of its proper divisors (1).

26715009889 is an equidigital number, since it uses as much as digits as its factorization.

26715009889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 26715009889 in words is "twenty-six billion, seven hundred fifteen million, nine thousand, eight hundred eighty-nine".