261646070511113 has 2 divisors, whose sum is σ = 261646070511114. Its totient is φ = 261646070511112.

The previous prime is 261646070511101. The next prime is 261646070511151. The reversal of 261646070511113 is 311115070646162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199748246765824 + 61897823745289 = 14133232^2 + 7867517^2 .

It is a cyclic number.

It is not a de Polignac number, because 261646070511113 - 2⁸ = 261646070510857 is a prime.

It is not a weakly prime, because it can be changed into another prime (261646070511313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130823035255556 + 130823035255557.

It is an arithmetic number, because the mean of its divisors is an integer number (130823035255557).

Almost surely, 2^{261646070511113} is an apocalyptic number.

It is an amenable number.

261646070511113 is a deficient number, since it is larger than the sum of its proper divisors (1).

261646070511113 is an equidigital number, since it uses as much as digits as its factorization.

261646070511113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 261646070511113 in words is "two hundred sixty-one trillion, six hundred forty-six billion, seventy million, five hundred eleven thousand, one hundred thirteen".