11646641 has 4 divisors (see below), whose sum is σ = 11661552. Its totient is φ = 11631732.

The previous prime is 11646631. The next prime is 11646653. The reversal of 11646641 is 14664611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11646641 - 2¹⁸ = 11384497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11646631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6215 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (2915388).

Almost surely, 2^11646641 is an apocalyptic number.

It is an amenable number.

11646641 is a deficient number, since it is larger than the sum of its proper divisors (14911).

11646641 is an equidigital number, since it uses as much as digits as its factorization.

11646641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14910.

The product of its digits is 3456, while the sum is 29.

The square root of 11646641 is about 3412.7175388538. The cubic root of 11646641 is about 226.6732281357.

The spelling of 11646641 in words is "eleven million, six hundred forty-six thousand, six hundred forty-one".