56543434566 has 8 divisors (see below), whose sum is σ = 113086869144. Its totient is φ = 18847811520.

The previous prime is 56543434559. The next prime is 56543434583. The reversal of 56543434566 is 66543434565.

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

56543434566 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4711952875 + ... + 4711952886.

It is an arithmetic number, because the mean of its divisors is an integer number (14135858643).

Almost surely, 2^56543434566 is an apocalyptic number.

56543434566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56543434566 is a wasteful number, since it uses less digits than its factorization.

56543434566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423905766.

The product of its digits is 15552000, while the sum is 51.

Subtracting 56543434566 from its reverse (66543434565), we obtain a palindrome (9999999999).

The spelling of 56543434566 in words is "fifty-six billion, five hundred forty-three million, four hundred thirty-four thousand, five hundred sixty-six".