56408338709 has 4 divisors (see below), whose sum is σ = 56409014220. Its totient is φ = 56407663200.

The previous prime is 56408338687. The next prime is 56408338717. The reversal of 56408338709 is 90783380465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90783380465 = 5 ⋅18156676093.

It can be written as a sum of positive squares in 2 ways, for example, as 38740080625 + 17668258084 = 196825^2 + 132922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56408338709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56408338729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191342 + ... + 386559.

It is an arithmetic number, because the mean of its divisors is an integer number (14102253555).

Almost surely, 2^56408338709 is an apocalyptic number.

It is an amenable number.

56408338709 is a deficient number, since it is larger than the sum of its proper divisors (675511).

56408338709 is an equidigital number, since it uses as much as digits as its factorization.

56408338709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675510.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 56408338709 in words is "fifty-six billion, four hundred eight million, three hundred thirty-eight thousand, seven hundred nine".