491105824193 has 2 divisors, whose sum is σ = 491105824194. Its totient is φ = 491105824192.

The previous prime is 491105824163. The next prime is 491105824199. The reversal of 491105824193 is 391428501194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485743484209 + 5362339984 = 696953^2 + 73228^2 .

It is a cyclic number.

It is not a de Polignac number, because 491105824193 - 2⁸ = 491105823937 is a prime.

It is not a weakly prime, because it can be changed into another prime (491105824199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245552912096 + 245552912097.

It is an arithmetic number, because the mean of its divisors is an integer number (245552912097).

Almost surely, 2^491105824193 is an apocalyptic number.

It is an amenable number.

491105824193 is a deficient number, since it is larger than the sum of its proper divisors (1).

491105824193 is an equidigital number, since it uses as much as digits as its factorization.

491105824193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 491105824193 in words is "four hundred ninety-one billion, one hundred five million, eight hundred twenty-four thousand, one hundred ninety-three".