56728445679 has 24 divisors (see below), whose sum is σ = 83185899264. Its totient is φ = 37248360000.

The previous prime is 56728445639. The next prime is 56728445699. The reversal of 56728445679 is 97654482765.

56728445679 is a `hidden beast` number, since 5 + 6 + 7 + 28 + 44 + 567 + 9 = 666.

It is not a de Polignac number, because 56728445679 - 2¹⁶ = 56728380143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56728445639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10249 + ... + 336989.

It is an arithmetic number, because the mean of its divisors is an integer number (3466079136).

Almost surely, 2^56728445679 is an apocalyptic number.

56728445679 is a deficient number, since it is larger than the sum of its proper divisors (26457453585).

56728445679 is a wasteful number, since it uses less digits than its factorization.

56728445679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327039 (or 327036 counting only the distinct ones).

The product of its digits is 101606400, while the sum is 63.

The spelling of 56728445679 in words is "fifty-six billion, seven hundred twenty-eight million, four hundred forty-five thousand, six hundred seventy-nine".