260503017491 has 2 divisors, whose sum is σ = 260503017492. Its totient is φ = 260503017490.

The previous prime is 260503017389. The next prime is 260503017539. The reversal of 260503017491 is 194710305062.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260503017491 is a prime.

It is not a weakly prime, because it can be changed into another prime (260503017791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130251508745 + 130251508746.

It is an arithmetic number, because the mean of its divisors is an integer number (130251508746).

Almost surely, 2^260503017491 is an apocalyptic number.

260503017491 is a deficient number, since it is larger than the sum of its proper divisors (1).

260503017491 is an equidigital number, since it uses as much as digits as its factorization.

260503017491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 260503017491 in words is "two hundred sixty billion, five hundred three million, seventeen thousand, four hundred ninety-one".