26261584536881 has 2 divisors, whose sum is σ = 26261584536882. Its totient is φ = 26261584536880.

The previous prime is 26261584536841. The next prime is 26261584536893. The reversal of 26261584536881 is 18863548516262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14959992874225 + 11301591662656 = 3867815^2 + 3361784^2 .

It is a cyclic number.

It is not a de Polignac number, because 26261584536881 - 2²⁶ = 26261517428017 is a prime.

It is a super-2 number, since 2×26261584536881² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26261584536841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13130792268440 + 13130792268441.

It is an arithmetic number, because the mean of its divisors is an integer number (13130792268441).

Almost surely, 2^{26261584536881} is an apocalyptic number.

It is an amenable number.

26261584536881 is a deficient number, since it is larger than the sum of its proper divisors (1).

26261584536881 is an equidigital number, since it uses as much as digits as its factorization.

26261584536881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132710400, while the sum is 65.

The spelling of 26261584536881 in words is "twenty-six trillion, two hundred sixty-one billion, five hundred eighty-four million, five hundred thirty-six thousand, eight hundred eighty-one".