56749928399 has 4 divisors (see below), whose sum is σ = 56818550664. Its totient is φ = 56681306136.

The previous prime is 56749928383. The next prime is 56749928449. The reversal of 56749928399 is 99382994765.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56749928399 - 2⁴ = 56749928383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56749928359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34309892 + ... + 34311545.

It is an arithmetic number, because the mean of its divisors is an integer number (14204637666).

Almost surely, 2^56749928399 is an apocalyptic number.

56749928399 is a deficient number, since it is larger than the sum of its proper divisors (68622265).

56749928399 is an equidigital number, since it uses as much as digits as its factorization.

56749928399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68622264.

The product of its digits is 264539520, while the sum is 71.

The spelling of 56749928399 in words is "fifty-six billion, seven hundred forty-nine million, nine hundred twenty-eight thousand, three hundred ninety-nine".