28081486171 has 4 divisors (see below), whose sum is σ = 28120543200. Its totient is φ = 28042429144.

The previous prime is 28081486141. The next prime is 28081486211. The reversal of 28081486171 is 17168418082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28081486171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28081486141) 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, 19527436 + ... + 19528873.

It is an arithmetic number, because the mean of its divisors is an integer number (7030135800).

Almost surely, 2^28081486171 is an apocalyptic number.

28081486171 is a deficient number, since it is larger than the sum of its proper divisors (39057029).

28081486171 is an equidigital number, since it uses as much as digits as its factorization.

28081486171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39057028.

The product of its (nonzero) digits is 172032, while the sum is 46.

The spelling of 28081486171 in words is "twenty-eight billion, eighty-one million, four hundred eighty-six thousand, one hundred seventy-one".