56546664565 has 8 divisors (see below), whose sum is σ = 70195859640. Its totient is φ = 43677423552.

The previous prime is 56546664557. The next prime is 56546664571.

56546664565 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 5632352401 + 50914312164 = 75049^2 + 225642^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 56546664565 - 2³ = 56546664557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194988354 + ... + 194988643.

It is an arithmetic number, because the mean of its divisors is an integer number (8774482455).

Almost surely, 2^56546664565 is an apocalyptic number.

It is an amenable number.

56546664565 is a deficient number, since it is larger than the sum of its proper divisors (13649195075).

56546664565 is a wasteful number, since it uses less digits than its factorization.

56546664565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389977031.

The product of its digits is 77760000, while the sum is 58.

The spelling of 56546664565 in words is "fifty-six billion, five hundred forty-six million, six hundred sixty-four thousand, five hundred sixty-five".