115566169 has 4 divisors (see below), whose sum is σ = 115672996. Its totient is φ = 115459344.

The previous prime is 115566161. The next prime is 115566181. The reversal of 115566169 is 961665511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 961665511 = 1609 ⋅597679.

It can be written as a sum of positive squares in 2 ways, for example, as 95316169 + 20250000 = 9763^2 + 4500^2 .

It is a cyclic number.

It is not a de Polignac number, because 115566169 - 2³ = 115566161 is a prime.

It is a super-2 number, since 2×115566169² = 26711078834673122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115566161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51774 + ... + 53959.

It is an arithmetic number, because the mean of its divisors is an integer number (28918249).

Almost surely, 2^115566169 is an apocalyptic number.

It is an amenable number.

115566169 is a deficient number, since it is larger than the sum of its proper divisors (106827).

115566169 is a wasteful number, since it uses less digits than its factorization.

115566169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106826.

The product of its digits is 48600, while the sum is 40.

The square root of 115566169 is about 10750.1706498083. The cubic root of 115566169 is about 487.0911499968.

The spelling of 115566169 in words is "one hundred fifteen million, five hundred sixty-six thousand, one hundred sixty-nine".