207128665980 has 72 divisors (see below), whose sum is σ = 628418700000. Its totient is φ = 55223021952.

The previous prime is 207128665963. The next prime is 207128665981. The reversal of 207128665980 is 89566821702.

207128665980 is a `hidden beast` number, since 20 + 7 + 1 + 28 + 6 + 6 + 598 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207128665981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 784726 + ... + 1014914.

It is an arithmetic number, because the mean of its divisors is an integer number (8728037500).

Almost surely, 2^207128665980 is an apocalyptic number.

207128665980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

207128665980 is an abundant number, since it is smaller than the sum of its proper divisors (421290034020).

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

207128665980 is a wasteful number, since it uses less digits than its factorization.

207128665980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235203 (or 235198 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 207128665980 in words is "two hundred seven billion, one hundred twenty-eight million, six hundred sixty-five thousand, nine hundred eighty".