1330331019491 has 2 divisors, whose sum is σ = 1330331019492. Its totient is φ = 1330331019490.

The previous prime is 1330331019439. The next prime is 1330331019547. The reversal of 1330331019491 is 1949101330331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1330331019491 - 2²² = 1330326825187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1330331019401) 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, 665165509745 + 665165509746.

It is an arithmetic number, because the mean of its divisors is an integer number (665165509746).

Almost surely, 2^{1330331019491} is an apocalyptic number.

1330331019491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330331019491 is an equidigital number, since it uses as much as digits as its factorization.

1330331019491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The spelling of 1330331019491 in words is "one trillion, three hundred thirty billion, three hundred thirty-one million, nineteen thousand, four hundred ninety-one".