26435136166861 has 2 divisors, whose sum is σ = 26435136166862. Its totient is φ = 26435136166860.

The previous prime is 26435136166739. The next prime is 26435136166877. The reversal of 26435136166861 is 16866163153462.

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., 13819099934025 + 12616036232836 = 3717405^2 + 3551906^2 .

It is a cyclic number.

It is not a de Polignac number, because 26435136166861 - 2²⁷ = 26435001949133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26435136166796 and 26435136166805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26435136166961) 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, 13217568083430 + 13217568083431.

It is an arithmetic number, because the mean of its divisors is an integer number (13217568083431).

Almost surely, 2^{26435136166861} is an apocalyptic number.

It is an amenable number.

26435136166861 is a deficient number, since it is larger than the sum of its proper divisors (1).

26435136166861 is an equidigital number, since it uses as much as digits as its factorization.

26435136166861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 58.

The spelling of 26435136166861 in words is "twenty-six trillion, four hundred thirty-five billion, one hundred thirty-six million, one hundred sixty-six thousand, eight hundred sixty-one".