28166632568 has 32 divisors (see below), whose sum is σ = 55559574000. Its totient is φ = 13367208960.

The previous prime is 28166632537. The next prime is 28166632607. The reversal of 28166632568 is 86523666182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015193 + ... + 1042568.

Almost surely, 2^28166632568 is an apocalyptic number.

It is an amenable number.

28166632568 is a deficient number, since it is larger than the sum of its proper divisors (27392941432).

28166632568 is a wasteful number, since it uses less digits than its factorization.

28166632568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057855 (or 2057851 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 53.

The spelling of 28166632568 in words is "twenty-eight billion, one hundred sixty-six million, six hundred thirty-two thousand, five hundred sixty-eight".