1491191424071 has 2 divisors, whose sum is σ = 1491191424072. Its totient is φ = 1491191424070.

The previous prime is 1491191423987. The next prime is 1491191424083. The reversal of 1491191424071 is 1704241911941.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1491191424071 - 2¹⁸ = 1491191161927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1491191484071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745595712035 + 745595712036.

It is an arithmetic number, because the mean of its divisors is an integer number (745595712036).

Almost surely, 2^{1491191424071} is an apocalyptic number.

1491191424071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491191424071 is an equidigital number, since it uses as much as digits as its factorization.

1491191424071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 1491191424071 in words is "one trillion, four hundred ninety-one billion, one hundred ninety-one million, four hundred twenty-four thousand, seventy-one".