128860178841 has 9 divisors (see below), whose sum is σ = 186132924991. Its totient is φ = 85906067952.

The previous prime is 128860178819. The next prime is 128860178873. The reversal of 128860178841 is 148871068821.

The square root of 128860178841 is 358971.

It is a perfect power (a square), and thus also a powerful number.

128860178841 is a `hidden beast` number, since 1 + 28 + 8 + 601 + 7 + 8 + 8 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27797225625 + 101062953216 = 166725^2 + 317904^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 128860178841 - 2⁹ = 128860178329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128860177841) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1017085 + ... + 1136741.

Almost surely, 2^128860178841 is an apocalyptic number.

128860178841 is the 358971-st square number.

128860178841 is the 179486-th centered octagonal number.

It is an amenable number.

128860178841 is a deficient number, since it is larger than the sum of its proper divisors (57272746150).

128860178841 is an frugal number, since it uses more digits than its factorization.

128860178841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239320 (or 119660 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 54.

The spelling of 128860178841 in words is "one hundred twenty-eight billion, eight hundred sixty million, one hundred seventy-eight thousand, eight hundred forty-one".