1166050393181 has 2 divisors, whose sum is σ = 1166050393182. Its totient is φ = 1166050393180.

The previous prime is 1166050393169. The next prime is 1166050393219. The reversal of 1166050393181 is 1813930506611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092265363225 + 73785029956 = 1045115^2 + 271634^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166050393181 - 2³⁰ = 1164976651357 is a prime.

It is a super-2 number, since 2×1166050393181² (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 (1166050390181) 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, 583025196590 + 583025196591.

It is an arithmetic number, because the mean of its divisors is an integer number (583025196591).

Almost surely, 2^{1166050393181} is an apocalyptic number.

It is an amenable number.

1166050393181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166050393181 is an equidigital number, since it uses as much as digits as its factorization.

1166050393181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 44.

Adding to 1166050393181 its reverse (1813930506611), we get a palindrome (2979980899792).

The spelling of 1166050393181 in words is "one trillion, one hundred sixty-six billion, fifty million, three hundred ninety-three thousand, one hundred eighty-one".