128052821907 has 12 divisors (see below), whose sum is σ = 184974346440. Its totient is φ = 85364320608.

The previous prime is 128052821903. The next prime is 128052821909. The reversal of 128052821907 is 709128250821.

128052821907 is a `hidden beast` number, since 1 + 280 + 5 + 282 + 1 + 90 + 7 = 666.

It is not a de Polignac number, because 128052821907 - 2² = 128052821903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128052821903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154593 + ... + 529154.

It is an arithmetic number, because the mean of its divisors is an integer number (15414528870).

Almost surely, 2^128052821907 is an apocalyptic number.

128052821907 is a deficient number, since it is larger than the sum of its proper divisors (56921524533).

128052821907 is a wasteful number, since it uses less digits than its factorization.

128052821907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704562 (or 704559 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 128052821907 in words is "one hundred twenty-eight billion, fifty-two million, eight hundred twenty-one thousand, nine hundred seven".