260243021791 has 2 divisors, whose sum is σ = 260243021792. Its totient is φ = 260243021790.

The previous prime is 260243021789. The next prime is 260243021803. The reversal of 260243021791 is 197120342062.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 260243021791 - 2¹ = 260243021789 is a prime.

Together with 260243021789, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 260243021791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (260243021761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130121510895 + 130121510896.

It is an arithmetic number, because the mean of its divisors is an integer number (130121510896).

Almost surely, 2^260243021791 is an apocalyptic number.

260243021791 is a deficient number, since it is larger than the sum of its proper divisors (1).

260243021791 is an equidigital number, since it uses as much as digits as its factorization.

260243021791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 260243021791 in words is "two hundred sixty billion, two hundred forty-three million, twenty-one thousand, seven hundred ninety-one".