28065517671 has 32 divisors (see below), whose sum is σ = 39724992000. Its totient is φ = 17575367040.

The previous prime is 28065517637. The next prime is 28065517679. The reversal of 28065517671 is 17671556082.

It is not a de Polignac number, because 28065517671 - 2⁶ = 28065517607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28065517671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28065517679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5356465 + ... + 5361701.

It is an arithmetic number, because the mean of its divisors is an integer number (1241406000).

Almost surely, 2^28065517671 is an apocalyptic number.

28065517671 is a deficient number, since it is larger than the sum of its proper divisors (11659474329).

28065517671 is a wasteful number, since it uses less digits than its factorization.

28065517671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039.

The product of its (nonzero) digits is 705600, while the sum is 48.

The spelling of 28065517671 in words is "twenty-eight billion, sixty-five million, five hundred seventeen thousand, six hundred seventy-one".