28171543017 has 4 divisors (see below), whose sum is σ = 37562057360. Its totient is φ = 18781028676.

The previous prime is 28171542989. The next prime is 28171543027. The reversal of 28171543017 is 71034517182.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28171543017 - 2¹⁵ = 28171510249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28171543027) 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, 4695257167 + ... + 4695257172.

It is an arithmetic number, because the mean of its divisors is an integer number (9390514340).

Almost surely, 2^28171543017 is an apocalyptic number.

It is an amenable number.

28171543017 is a deficient number, since it is larger than the sum of its proper divisors (9390514343).

28171543017 is an equidigital number, since it uses as much as digits as its factorization.

28171543017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9390514342.

The product of its (nonzero) digits is 47040, while the sum is 39.

The spelling of 28171543017 in words is "twenty-eight billion, one hundred seventy-one million, five hundred forty-three thousand, seventeen".