11578161 has 24 divisors (see below), whose sum is σ = 18203520. Its totient is φ = 6525792.

The previous prime is 11578157. The next prime is 11578181. The reversal of 11578161 is 16187511.

It is not a de Polignac number, because 11578161 - 2² = 11578157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11578111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11115 + ... + 12111.

It is an arithmetic number, because the mean of its divisors is an integer number (758480).

Almost surely, 2^11578161 is an apocalyptic number.

It is an amenable number.

11578161 is a deficient number, since it is larger than the sum of its proper divisors (6625359).

11578161 is an equidigital number, since it uses as much as digits as its factorization.

11578161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093 (or 1086 counting only the distinct ones).

The product of its digits is 1680, while the sum is 30.

The square root of 11578161 is about 3402.6696871721. The cubic root of 11578161 is about 226.2280896133.

The spelling of 11578161 in words is "eleven million, five hundred seventy-eight thousand, one hundred sixty-one".