1161441974911 has 2 divisors, whose sum is σ = 1161441974912. Its totient is φ = 1161441974910.

The previous prime is 1161441974899. The next prime is 1161441974969. The reversal of 1161441974911 is 1194791441611.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1194791441611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161441974911 - 2¹³ = 1161441966719 is a prime.

It is a super-2 number, since 2×1161441974911² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161441974711) 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, 580720987455 + 580720987456.

It is an arithmetic number, because the mean of its divisors is an integer number (580720987456).

Almost surely, 2^{1161441974911} is an apocalyptic number.

1161441974911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161441974911 is an equidigital number, since it uses as much as digits as its factorization.

1161441974911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 49.

The spelling of 1161441974911 in words is "one trillion, one hundred sixty-one billion, four hundred forty-one million, nine hundred seventy-four thousand, nine hundred eleven".