26656756261 has 2 divisors, whose sum is σ = 26656756262. Its totient is φ = 26656756260.

The previous prime is 26656756201. The next prime is 26656756289. The reversal of 26656756261 is 16265765662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22870815361 + 3785940900 = 151231^2 + 61530^2 .

It is a cyclic number.

It is not a de Polignac number, because 26656756261 - 2¹¹ = 26656754213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26656756199 and 26656756208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26656756201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13328378130 + 13328378131.

It is an arithmetic number, because the mean of its divisors is an integer number (13328378131).

Almost surely, 2^26656756261 is an apocalyptic number.

It is an amenable number.

26656756261 is a deficient number, since it is larger than the sum of its proper divisors (1).

26656756261 is an equidigital number, since it uses as much as digits as its factorization.

26656756261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 52.

The spelling of 26656756261 in words is "twenty-six billion, six hundred fifty-six million, seven hundred fifty-six thousand, two hundred sixty-one".