111165161689 has 2 divisors, whose sum is σ = 111165161690. Its totient is φ = 111165161688.

The previous prime is 111165161683. The next prime is 111165161719. The reversal of 111165161689 is 986161561111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82228430025 + 28936731664 = 286755^2 + 170108^2 .

It is a cyclic number.

It is not a de Polignac number, because 111165161689 - 2¹¹ = 111165159641 is a prime.

It is not a weakly prime, because it can be changed into another prime (111165161683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55582580844 + 55582580845.

It is an arithmetic number, because the mean of its divisors is an integer number (55582580845).

Almost surely, 2^111165161689 is an apocalyptic number.

It is an amenable number.

111165161689 is a deficient number, since it is larger than the sum of its proper divisors (1).

111165161689 is an equidigital number, since it uses as much as digits as its factorization.

111165161689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 46.

The spelling of 111165161689 in words is "one hundred eleven billion, one hundred sixty-five million, one hundred sixty-one thousand, six hundred eighty-nine".