168555112728 has 64 divisors (see below), whose sum is σ = 423454310400. Its totient is φ = 55909854720.

The previous prime is 168555112721. The next prime is 168555112757. The reversal of 168555112728 is 827211555861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168555112721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8220393 + ... + 8240871.

It is an arithmetic number, because the mean of its divisors is an integer number (6616473600).

Almost surely, 2^168555112728 is an apocalyptic number.

It is an amenable number.

168555112728 is an abundant number, since it is smaller than the sum of its proper divisors (254899197672).

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

168555112728 is a wasteful number, since it uses less digits than its factorization.

168555112728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22152 (or 22148 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 51.

The spelling of 168555112728 in words is "one hundred sixty-eight billion, five hundred fifty-five million, one hundred twelve thousand, seven hundred twenty-eight".