28159842667 has 4 divisors (see below), whose sum is σ = 30719828376. Its totient is φ = 25599856960.

The previous prime is 28159842647. The next prime is 28159842707. The reversal of 28159842667 is 76624895182.

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 28159842667 - 2¹¹ = 28159840619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28159842647) 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 3 ways as a sum of consecutive naturals, for example, 1279992838 + ... + 1279992859.

It is an arithmetic number, because the mean of its divisors is an integer number (7679957094).

Almost surely, 2^28159842667 is an apocalyptic number.

28159842667 is a deficient number, since it is larger than the sum of its proper divisors (2559985709).

28159842667 is a wasteful number, since it uses less digits than its factorization.

28159842667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559985708.

The product of its digits is 11612160, while the sum is 58.

The spelling of 28159842667 in words is "twenty-eight billion, one hundred fifty-nine million, eight hundred forty-two thousand, six hundred sixty-seven".