26260011989 has 2 divisors, whose sum is σ = 26260011990. Its totient is φ = 26260011988.

The previous prime is 26260011971. The next prime is 26260012039. The reversal of 26260011989 is 98911006262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25546587889 + 713424100 = 159833^2 + 26710^2 .

It is a cyclic number.

It is not a de Polignac number, because 26260011989 - 2³² = 21965044693 is a prime.

It is a super-2 number, since 2×26260011989² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26260031989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13130005994 + 13130005995.

It is an arithmetic number, because the mean of its divisors is an integer number (13130005995).

Almost surely, 2^26260011989 is an apocalyptic number.

It is an amenable number.

26260011989 is a deficient number, since it is larger than the sum of its proper divisors (1).

26260011989 is an equidigital number, since it uses as much as digits as its factorization.

26260011989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 26260011989 in words is "twenty-six billion, two hundred sixty million, eleven thousand, nine hundred eighty-nine".