28309143165 has 16 divisors (see below), whose sum is σ = 46258345728. Its totient is φ = 14776970816.

The previous prime is 28309143151. The next prime is 28309143173. The reversal of 28309143165 is 56134190382.

It is a cyclic number.

It is not a de Polignac number, because 28309143165 - 2⁸ = 28309142909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20076702 + ... + 20078111.

It is an arithmetic number, because the mean of its divisors is an integer number (2891146608).

Almost surely, 2^28309143165 is an apocalyptic number.

It is an amenable number.

28309143165 is a deficient number, since it is larger than the sum of its proper divisors (17949202563).

28309143165 is a wasteful number, since it uses less digits than its factorization.

28309143165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40154868.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 28309143165 in words is "twenty-eight billion, three hundred nine million, one hundred forty-three thousand, one hundred sixty-five".