128911994852 has 12 divisors (see below), whose sum is σ = 225598888620. Its totient is φ = 64455169536.

The previous prime is 128911994803. The next prime is 128911994873. The reversal of 128911994852 is 258499119821.

It can be written as a sum of positive squares in 2 ways, for example, as 97247927716 + 31664067136 = 311846^2 + 177944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128911994791 and 128911994800.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 260888 + ... + 570864.

It is an arithmetic number, because the mean of its divisors is an integer number (18799907385).

Almost surely, 2^128911994852 is an apocalyptic number.

It is an amenable number.

128911994852 is a deficient number, since it is larger than the sum of its proper divisors (96686893768).

128911994852 is a wasteful number, since it uses less digits than its factorization.

128911994852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413950 (or 413948 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 59.

The spelling of 128911994852 in words is "one hundred twenty-eight billion, nine hundred eleven million, nine hundred ninety-four thousand, eight hundred fifty-two".