128876941520 has 40 divisors (see below), whose sum is σ = 317264709384. Its totient is φ = 48518377472.

The previous prime is 128876941513. The next prime is 128876941559. The reversal of 128876941520 is 25149678821.

It can be written as a sum of positive squares in 4 ways, for example, as 32185795216 + 96691146304 = 179404^2 + 310952^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47379869 + ... + 47382588.

Almost surely, 2^128876941520 is an apocalyptic number.

128876941520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128876941520 is an abundant number, since it is smaller than the sum of its proper divisors (188387767864).

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

128876941520 is a wasteful number, since it uses less digits than its factorization.

128876941520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94762487 (or 94762481 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 128876941520 in words is "one hundred twenty-eight billion, eight hundred seventy-six million, nine hundred forty-one thousand, five hundred twenty".