261674027717 has 2 divisors, whose sum is σ = 261674027718. Its totient is φ = 261674027716.

The previous prime is 261674027711. The next prime is 261674027753. The reversal of 261674027717 is 717720476162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261571896481 + 102131236 = 511441^2 + 10106^2 .

It is a cyclic number.

It is not a de Polignac number, because 261674027717 - 2⁶ = 261674027653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261674027711) 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, 130837013858 + 130837013859.

It is an arithmetic number, because the mean of its divisors is an integer number (130837013859).

Almost surely, 2^261674027717 is an apocalyptic number.

It is an amenable number.

261674027717 is a deficient number, since it is larger than the sum of its proper divisors (1).

261674027717 is an equidigital number, since it uses as much as digits as its factorization.

261674027717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382976, while the sum is 50.

The spelling of 261674027717 in words is "two hundred sixty-one billion, six hundred seventy-four million, twenty-seven thousand, seven hundred seventeen".