28166918875 has 16 divisors (see below), whose sum is σ = 35969817312. Its totient is φ = 22009495200.

The previous prime is 28166918873. The next prime is 28166918887. The reversal of 28166918875 is 57881966182.

It is not a de Polignac number, because 28166918875 - 2¹ = 28166918873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28166918873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2614804 + ... + 2625553.

It is an arithmetic number, because the mean of its divisors is an integer number (2248113582).

Almost surely, 2^28166918875 is an apocalyptic number.

28166918875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28166918875 is a deficient number, since it is larger than the sum of its proper divisors (7802898437).

28166918875 is an equidigital number, since it uses as much as digits as its factorization.

28166918875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240415 (or 5240405 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 61.

The spelling of 28166918875 in words is "twenty-eight billion, one hundred sixty-six million, nine hundred eighteen thousand, eight hundred seventy-five".