11553643 has 4 divisors (see below), whose sum is σ = 11565688. Its totient is φ = 11541600.

The previous prime is 11553631. The next prime is 11553649. The reversal of 11553643 is 34635511.

11553643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11553643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11553649) 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, 4446 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (2891422).

Almost surely, 2^11553643 is an apocalyptic number.

11553643 is a deficient number, since it is larger than the sum of its proper divisors (12045).

11553643 is a wasteful number, since it uses less digits than its factorization.

11553643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12044.

The product of its digits is 5400, while the sum is 28.

The square root of 11553643 is about 3399.0650185014. The cubic root of 11553643 is about 226.0682893327.

The spelling of 11553643 in words is "eleven million, five hundred fifty-three thousand, six hundred forty-three".