11456643 has 24 divisors (see below), whose sum is σ = 17264464. Its totient is φ = 6747840.

The previous prime is 11456611. The next prime is 11456647. The reversal of 11456643 is 34665411.

It is not a de Polignac number, because 11456643 - 2⁵ = 11456611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11456643.

It is not an unprimeable number, because it can be changed into a prime (11456647) 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, 13005 + ... + 13857.

Almost surely, 2^11456643 is an apocalyptic number.

11456643 is a deficient number, since it is larger than the sum of its proper divisors (5807821).

11456643 is a wasteful number, since it uses less digits than its factorization.

11456643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 904 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 11456643 is about 3384.7663139425. The cubic root of 11456643 is about 225.4338493255.

It can be divided in two parts, 11 and 456643, that added together give a palindrome (456654).

The spelling of 11456643 in words is "eleven million, four hundred fifty-six thousand, six hundred forty-three".