11578643 has 4 divisors (see below), whose sum is σ = 11593440. Its totient is φ = 11563848.

The previous prime is 11578639. The next prime is 11578661. The reversal of 11578643 is 34687511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11578643 - 2² = 11578639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11578613) 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 3 ways as a sum of consecutive naturals, for example, 6155 + ... + 7812.

It is an arithmetic number, because the mean of its divisors is an integer number (2898360).

Almost surely, 2^11578643 is an apocalyptic number.

11578643 is a deficient number, since it is larger than the sum of its proper divisors (14797).

11578643 is an equidigital number, since it uses as much as digits as its factorization.

11578643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14796.

The product of its digits is 20160, while the sum is 35.

The square root of 11578643 is about 3402.7405131746. The cubic root of 11578643 is about 226.2312288691.

It can be divided in two parts, 11578 and 643, that added together give a palindrome (12221).

The spelling of 11578643 in words is "eleven million, five hundred seventy-eight thousand, six hundred forty-three".