28158190195 has 16 divisors (see below), whose sum is σ = 34048717920. Its totient is φ = 22354078464.

The previous prime is 28158190189. The next prime is 28158190217. The reversal of 28158190195 is 59109185182.

It is a cyclic number.

It is not a de Polignac number, because 28158190195 - 2²⁹ = 27621319283 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2535124 + ... + 2546206.

It is an arithmetic number, because the mean of its divisors is an integer number (2128044870).

Almost surely, 2^28158190195 is an apocalyptic number.

28158190195 is a deficient number, since it is larger than the sum of its proper divisors (5890527725).

28158190195 is a wasteful number, since it uses less digits than its factorization.

28158190195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14934.

The product of its (nonzero) digits is 259200, while the sum is 49.

The spelling of 28158190195 in words is "twenty-eight billion, one hundred fifty-eight million, one hundred ninety thousand, one hundred ninety-five".