56783844721 has 8 divisors (see below), whose sum is σ = 57247776000. Its totient is φ = 56321018160.

The previous prime is 56783844697. The next prime is 56783844739. The reversal of 56783844721 is 12744838765.

56783844721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56783844721 - 2¹¹ = 56783842673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56783844781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172801 + ... + 378718.

It is an arithmetic number, because the mean of its divisors is an integer number (7155972000).

Almost surely, 2^56783844721 is an apocalyptic number.

It is an amenable number.

56783844721 is a deficient number, since it is larger than the sum of its proper divisors (463931279).

56783844721 is a wasteful number, since it uses less digits than its factorization.

56783844721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552359.

The product of its digits is 9031680, while the sum is 55.

The spelling of 56783844721 in words is "fifty-six billion, seven hundred eighty-three million, eight hundred forty-four thousand, seven hundred twenty-one".