28165627756668 has 12 divisors (see below), whose sum is σ = 65719798098920. Its totient is φ = 9388542585552.

The previous prime is 28165627756649. The next prime is 28165627756753. The reversal of 28165627756668 is 86665772656182.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28165627756668.

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 3 ways as a sum of consecutive naturals, for example, 1173567823183 + ... + 1173567823206.

Almost surely, 2^{28165627756668} is an apocalyptic number.

It is an amenable number.

28165627756668 is an abundant number, since it is smaller than the sum of its proper divisors (37554170342252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28165627756668 is a wasteful number, since it uses less digits than its factorization.

28165627756668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347135646396 (or 2347135646394 counting only the distinct ones).

The product of its digits is 2438553600, while the sum is 75.

The spelling of 28165627756668 in words is "twenty-eight trillion, one hundred sixty-five billion, six hundred twenty-seven million, seven hundred fifty-six thousand, six hundred sixty-eight".