28568716123 has 4 divisors (see below), whose sum is σ = 28569702088. Its totient is φ = 28567730160.

The previous prime is 28568716109. The next prime is 28568716171. The reversal of 28568716123 is 32161786582.

It is a happy number.

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 28568716123 - 2¹³ = 28568707931 is a prime.

It is a super-2 number, since 2×28568716123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28568716523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448161 + ... + 507922.

It is an arithmetic number, because the mean of its divisors is an integer number (7142425522).

Almost surely, 2^28568716123 is an apocalyptic number.

28568716123 is a deficient number, since it is larger than the sum of its proper divisors (985965).

28568716123 is an equidigital number, since it uses as much as digits as its factorization.

28568716123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985964.

The product of its digits is 967680, while the sum is 49.

The spelling of 28568716123 in words is "twenty-eight billion, five hundred sixty-eight million, seven hundred sixteen thousand, one hundred twenty-three".