1161945720041 has 2 divisors, whose sum is σ = 1161945720042. Its totient is φ = 1161945720040.

The previous prime is 1161945719989. The next prime is 1161945720049. The reversal of 1161945720041 is 1400275491611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 624883926016 + 537061794025 = 790496^2 + 732845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161945720041 - 2²² = 1161941525737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161945720049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580972860020 + 580972860021.

It is an arithmetic number, because the mean of its divisors is an integer number (580972860021).

Almost surely, 2^{1161945720041} is an apocalyptic number.

It is an amenable number.

1161945720041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161945720041 is an equidigital number, since it uses as much as digits as its factorization.

1161945720041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 1161945720041 in words is "one trillion, one hundred sixty-one billion, nine hundred forty-five million, seven hundred twenty thousand, forty-one".