128526166856 has 8 divisors (see below), whose sum is σ = 240986562870. Its totient is φ = 64263083424.

The previous prime is 128526166819. The next prime is 128526166859. The reversal of 128526166856 is 658661625821.

It can be written as a sum of positive squares in only one way, i.e., 118067832100 + 10458334756 = 343610^2 + 102266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (128526166859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8032885421 + ... + 8032885436.

Almost surely, 2^128526166856 is an apocalyptic number.

It is an amenable number.

128526166856 is a deficient number, since it is larger than the sum of its proper divisors (112460396014).

128526166856 is a wasteful number, since it uses less digits than its factorization.

128526166856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16065770863 (or 16065770859 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 56.

The spelling of 128526166856 in words is "one hundred twenty-eight billion, five hundred twenty-six million, one hundred sixty-six thousand, eight hundred fifty-six".