26360135981 has 2 divisors, whose sum is σ = 26360135982. Its totient is φ = 26360135980.

The previous prime is 26360135939. The next prime is 26360135993. The reversal of 26360135981 is 18953106362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15063634756 + 11296501225 = 122734^2 + 106285^2 .

It is a cyclic number.

It is not a de Polignac number, because 26360135981 - 2³⁰ = 25286394157 is a prime.

It is a super-2 number, since 2×26360135981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26360155981) 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, 13180067990 + 13180067991.

It is an arithmetic number, because the mean of its divisors is an integer number (13180067991).

Almost surely, 2^26360135981 is an apocalyptic number.

It is an amenable number.

26360135981 is a deficient number, since it is larger than the sum of its proper divisors (1).

26360135981 is an equidigital number, since it uses as much as digits as its factorization.

26360135981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 26360135981 in words is "twenty-six billion, three hundred sixty million, one hundred thirty-five thousand, nine hundred eighty-one".