28081830163 has 4 divisors (see below), whose sum is σ = 28142482528. Its totient is φ = 28021177800.

The previous prime is 28081830089. The next prime is 28081830187. The reversal of 28081830163 is 36103818082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36103818082 = 2 ⋅18051909041.

It is a cyclic number.

It is not a de Polignac number, because 28081830163 - 2²⁹ = 27544959251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28081830193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30325488 + ... + 30326413.

It is an arithmetic number, because the mean of its divisors is an integer number (7035620632).

Almost surely, 2^28081830163 is an apocalyptic number.

28081830163 is a deficient number, since it is larger than the sum of its proper divisors (60652365).

28081830163 is an equidigital number, since it uses as much as digits as its factorization.

28081830163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60652364.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 28081830163 in words is "twenty-eight billion, eighty-one million, eight hundred thirty thousand, one hundred sixty-three".