28081830165 has 16 divisors (see below), whose sum is σ = 45546422208. Its totient is φ = 14771811456.

The previous prime is 28081830089. The next prime is 28081830187. The reversal of 28081830165 is 56103818082.

It is not a de Polignac number, because 28081830165 - 2¹⁰ = 28081829141 is a prime.

It is a Curzon number.

It is a congruent number.

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, 12821659 + ... + 12823848.

It is an arithmetic number, because the mean of its divisors is an integer number (2846651388).

Almost surely, 2^28081830165 is an apocalyptic number.

It is an amenable number.

28081830165 is a deficient number, since it is larger than the sum of its proper divisors (17464592043).

28081830165 is a wasteful number, since it uses less digits than its factorization.

28081830165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25645588.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 28081830165 in words is "twenty-eight billion, eighty-one million, eight hundred thirty thousand, one hundred sixty-five".