28507171064 has 8 divisors (see below), whose sum is σ = 53450945760. Its totient is φ = 14253585528.

The previous prime is 28507171039. The next prime is 28507171111. The reversal of 28507171064 is 46017170582.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1781698184 + ... + 1781698199.

It is an arithmetic number, because the mean of its divisors is an integer number (6681368220).

Almost surely, 2^28507171064 is an apocalyptic number.

It is an amenable number.

28507171064 is a deficient number, since it is larger than the sum of its proper divisors (24943774696).

28507171064 is a wasteful number, since it uses less digits than its factorization.

28507171064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563396389 (or 3563396385 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 28507171064 in words is "twenty-eight billion, five hundred seven million, one hundred seventy-one thousand, sixty-four".