28164885121 has 8 divisors (see below), whose sum is σ = 28252635840. Its totient is φ = 28077186768.

The previous prime is 28164885109. The next prime is 28164885137. The reversal of 28164885121 is 12158846182.

It is a happy number.

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 28164885121 - 2⁹ = 28164884609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28164885821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251450 + ... + 1273756.

It is an arithmetic number, because the mean of its divisors is an integer number (3531579480).

Almost surely, 2^28164885121 is an apocalyptic number.

It is an amenable number.

28164885121 is a deficient number, since it is larger than the sum of its proper divisors (87750719).

28164885121 is a wasteful number, since it uses less digits than its factorization.

28164885121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26183.

The product of its digits is 245760, while the sum is 46.

The spelling of 28164885121 in words is "twenty-eight billion, one hundred sixty-four million, eight hundred eighty-five thousand, one hundred twenty-one".