11564643 has 8 divisors (see below), whose sum is σ = 15917056. Its totient is φ = 7461000.

The previous prime is 11564629. The next prime is 11564647. The reversal of 11564643 is 34646511.

11564643 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11564643 - 2¹² = 11560547 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 11564643.

It is not an unprimeable number, because it can be changed into a prime (11564647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62083 + ... + 62268.

It is an arithmetic number, because the mean of its divisors is an integer number (1989632).

Almost surely, 2^11564643 is an apocalyptic number.

11564643 is a deficient number, since it is larger than the sum of its proper divisors (4352413).

11564643 is a wasteful number, since it uses less digits than its factorization.

11564643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124385.

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

The square root of 11564643 is about 3400.6827255714. The cubic root of 11564643 is about 226.1400116574.

The spelling of 11564643 in words is "eleven million, five hundred sixty-four thousand, six hundred forty-three".