56081728821 has 8 divisors (see below), whose sum is σ = 74778936480. Its totient is φ = 37386170192.

The previous prime is 56081728811. The next prime is 56081728883. The reversal of 56081728821 is 12882718065.

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 56081728821 - 2¹¹ = 56081726773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56081728811) 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 7 ways as a sum of consecutive naturals, for example, 330591 + ... + 470588.

It is an arithmetic number, because the mean of its divisors is an integer number (9347367060).

Almost surely, 2^56081728821 is an apocalyptic number.

It is an amenable number.

56081728821 is a deficient number, since it is larger than the sum of its proper divisors (18697207659).

56081728821 is a wasteful number, since it uses less digits than its factorization.

56081728821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824515.

The product of its (nonzero) digits is 430080, while the sum is 48.

The spelling of 56081728821 in words is "fifty-six billion, eighty-one million, seven hundred twenty-eight thousand, eight hundred twenty-one".