128110943777 has 4 divisors (see below), whose sum is σ = 128112179076. Its totient is φ = 128109708480.

The previous prime is 128110943717. The next prime is 128110943783. The reversal of 128110943777 is 777349011821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55338328081 + 72772615696 = 235241^2 + 269764^2 .

It is a cyclic number.

It is not a de Polignac number, because 128110943777 - 2¹⁶ = 128110878241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128110943707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446228 + ... + 674789.

It is an arithmetic number, because the mean of its divisors is an integer number (32028044769).

Almost surely, 2^128110943777 is an apocalyptic number.

It is an amenable number.

128110943777 is a deficient number, since it is larger than the sum of its proper divisors (1235299).

128110943777 is a wasteful number, since it uses less digits than its factorization.

128110943777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235298.

The product of its (nonzero) digits is 592704, while the sum is 50.

The spelling of 128110943777 in words is "one hundred twenty-eight billion, one hundred ten million, nine hundred forty-three thousand, seven hundred seventy-seven".