209975096128 has 56 divisors (see below), whose sum is σ = 487808040384. Its totient is φ = 87794457600.

The previous prime is 209975096113. The next prime is 209975096141. The reversal of 209975096128 is 821690579902.

209975096128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 5697418 + ... + 5734153.

It is an arithmetic number, because the mean of its divisors is an integer number (8710857864).

Almost surely, 2^209975096128 is an apocalyptic number.

209975096128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

209975096128 is an abundant number, since it is smaller than the sum of its proper divisors (277832944256).

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

209975096128 is a wasteful number, since it uses less digits than its factorization.

209975096128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11431631 (or 11431621 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 209975096128 in words is "two hundred nine billion, nine hundred seventy-five million, ninety-six thousand, one hundred twenty-eight".