28166827127 has 4 divisors (see below), whose sum is σ = 28167193080. Its totient is φ = 28166461176.

The previous prime is 28166827099. The next prime is 28166827147. The reversal of 28166827127 is 72172866182.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28166827127 - 2⁶ = 28166827063 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 (28166827147) 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, 17852 + ... + 238017.

It is an arithmetic number, because the mean of its divisors is an integer number (7041798270).

Almost surely, 2^28166827127 is an apocalyptic number.

28166827127 is a deficient number, since it is larger than the sum of its proper divisors (365953).

28166827127 is a wasteful number, since it uses less digits than its factorization.

28166827127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365952.

The product of its digits is 903168, while the sum is 50.

The spelling of 28166827127 in words is "twenty-eight billion, one hundred sixty-six million, eight hundred twenty-seven thousand, one hundred twenty-seven".