1161188188217 has 2 divisors, whose sum is σ = 1161188188218. Its totient is φ = 1161188188216.

The previous prime is 1161188188213. The next prime is 1161188188229. The reversal of 1161188188217 is 7128818811611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1161180811561 + 7376656 = 1077581^2 + 2716^2 .

It is a cyclic number.

It is not a de Polignac number, because 1161188188217 - 2² = 1161188188213 is a prime.

It is not a weakly prime, because it can be changed into another prime (1161188188211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580594094108 + 580594094109.

It is an arithmetic number, because the mean of its divisors is an integer number (580594094109).

Almost surely, 2^{1161188188217} is an apocalyptic number.

It is an amenable number.

1161188188217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161188188217 is an equidigital number, since it uses as much as digits as its factorization.

1161188188217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 344064, while the sum is 53.

The spelling of 1161188188217 in words is "one trillion, one hundred sixty-one billion, one hundred eighty-eight million, one hundred eighty-eight thousand, two hundred seventeen".