4491870536191 has 2 divisors, whose sum is σ = 4491870536192. Its totient is φ = 4491870536190.

The previous prime is 4491870536173. The next prime is 4491870536243. The reversal of 4491870536191 is 1916350781944.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4491870536191 - 2⁵ = 4491870536159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4491870536161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2245935268095 + 2245935268096.

It is an arithmetic number, because the mean of its divisors is an integer number (2245935268096).

Almost surely, 2^{4491870536191} is an apocalyptic number.

4491870536191 is a deficient number, since it is larger than the sum of its proper divisors (1).

4491870536191 is an equidigital number, since it uses as much as digits as its factorization.

4491870536191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 4491870536191 in words is "four trillion, four hundred ninety-one billion, eight hundred seventy million, five hundred thirty-six thousand, one hundred ninety-one".