128271613700166 has 8 divisors (see below), whose sum is σ = 256543227400344. Its totient is φ = 42757204566720.

The previous prime is 128271613700147. The next prime is 128271613700189. The reversal of 128271613700166 is 661007316172821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

128271613700166 is an admirable number.

It is a super-2 number, since 2×128271613700166² (a number of 29 digits) contains 22 as substring.

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, 10689301141675 + ... + 10689301141686.

It is an arithmetic number, because the mean of its divisors is an integer number (32067903425043).

Almost surely, 2^{128271613700166} is an apocalyptic number.

128271613700166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128271613700166 is a wasteful number, since it uses less digits than its factorization.

128271613700166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21378602283366.

The product of its (nonzero) digits is 1016064, while the sum is 51.

Adding to 128271613700166 its reverse (661007316172821), we get a palindrome (789278929872987).

The spelling of 128271613700166 in words is "one hundred twenty-eight trillion, two hundred seventy-one billion, six hundred thirteen million, seven hundred thousand, one hundred sixty-six".