491213195027 has 2 divisors, whose sum is σ = 491213195028. Its totient is φ = 491213195026.

The previous prime is 491213195009. The next prime is 491213195071. The reversal of 491213195027 is 720591312194.

It is an a-pointer prime, because the next prime (491213195071) can be obtained adding 491213195027 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491213195027 - 2³⁰ = 490139453203 is a prime.

It is not a weakly prime, because it can be changed into another prime (491213195927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245606597513 + 245606597514.

It is an arithmetic number, because the mean of its divisors is an integer number (245606597514).

Almost surely, 2^491213195027 is an apocalyptic number.

491213195027 is a deficient number, since it is larger than the sum of its proper divisors (1).

491213195027 is an equidigital number, since it uses as much as digits as its factorization.

491213195027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 491213195027 in words is "four hundred ninety-one billion, two hundred thirteen million, one hundred ninety-five thousand, twenty-seven".