11356266265261 has 2 divisors, whose sum is σ = 11356266265262. Its totient is φ = 11356266265260.

The previous prime is 11356266265259. The next prime is 11356266265363. The reversal of 11356266265261 is 16256266265311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6604437408100 + 4751828857161 = 2569910^2 + 2179869^2 .

It is a cyclic number.

It is not a de Polignac number, because 11356266265261 - 2¹ = 11356266265259 is a prime.

Together with 11356266265259, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11356266265199 and 11356266265208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11356266265661) 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, 5678133132630 + 5678133132631.

It is an arithmetic number, because the mean of its divisors is an integer number (5678133132631).

Almost surely, 2^{11356266265261} is an apocalyptic number.

It is an amenable number.

11356266265261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11356266265261 is an equidigital number, since it uses as much as digits as its factorization.

11356266265261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 52.

The spelling of 11356266265261 in words is "eleven trillion, three hundred fifty-six billion, two hundred sixty-six million, two hundred sixty-five thousand, two hundred sixty-one".