26049520685761 has 2 divisors, whose sum is σ = 26049520685762. Its totient is φ = 26049520685760.

The previous prime is 26049520685743. The next prime is 26049520685891. The reversal of 26049520685761 is 16758602594062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24231793856400 + 1817726829361 = 4922580^2 + 1348231^2 .

It is a cyclic number.

It is not a de Polignac number, because 26049520685761 - 2¹³ = 26049520677569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26049520685761.

It is not a weakly prime, because it can be changed into another prime (26049520685561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13024760342880 + 13024760342881.

It is an arithmetic number, because the mean of its divisors is an integer number (13024760342881).

Almost surely, 2^{26049520685761} is an apocalyptic number.

It is an amenable number.

26049520685761 is a deficient number, since it is larger than the sum of its proper divisors (1).

26049520685761 is an equidigital number, since it uses as much as digits as its factorization.

26049520685761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 26049520685761 in words is "twenty-six trillion, forty-nine billion, five hundred twenty million, six hundred eighty-five thousand, seven hundred sixty-one".