11656564343 has 4 divisors (see below), whose sum is σ = 11666385720. Its totient is φ = 11646742968.

The previous prime is 11656564229. The next prime is 11656564379. The reversal of 11656564343 is 34346565611.

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-11656564343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11656564294 and 11656564303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11656564393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4908908 + ... + 4911281.

It is an arithmetic number, because the mean of its divisors is an integer number (2916596430).

Almost surely, 2^11656564343 is an apocalyptic number.

11656564343 is a deficient number, since it is larger than the sum of its proper divisors (9821377).

11656564343 is an equidigital number, since it uses as much as digits as its factorization.

11656564343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821376.

The product of its digits is 777600, while the sum is 44.

The spelling of 11656564343 in words is "eleven billion, six hundred fifty-six million, five hundred sixty-four thousand, three hundred forty-three".