56642424665 has 8 divisors (see below), whose sum is σ = 68212800648. Its totient is φ = 45152679040.

The previous prime is 56642424647. The next prime is 56642424703.

56642424665 is nontrivially palindromic in base 10.

56642424665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11618252944 + 45024171721 = 107788^2 + 212189^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-56642424665 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20156042 + ... + 20158851.

It is an arithmetic number, because the mean of its divisors is an integer number (8526600081).

Almost surely, 2^56642424665 is an apocalyptic number.

It is an amenable number.

56642424665 is a deficient number, since it is larger than the sum of its proper divisors (11570375983).

56642424665 is a wasteful number, since it uses less digits than its factorization.

56642424665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40315179.

The product of its digits is 8294400, while the sum is 50.

The spelling of 56642424665 in words is "fifty-six billion, six hundred forty-two million, four hundred twenty-four thousand, six hundred sixty-five".