7872163209 has 24 divisors (see below), whose sum is σ = 11640781152. Its totient is φ = 5123664000.

The previous prime is 7872163183. The next prime is 7872163213. The reversal of 7872163209 is 9023612787.

7872163209 is a `hidden beast` number, since 7 + 8 + 7 + 2 + 1 + 632 + 0 + 9 = 666.

It is not a de Polignac number, because 7872163209 - 2⁵ = 7872163177 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7872163289) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1255009 + ... + 1261265.

It is an arithmetic number, because the mean of its divisors is an integer number (485032548).

Almost surely, 2^7872163209 is an apocalyptic number.

It is an amenable number.

7872163209 is a deficient number, since it is larger than the sum of its proper divisors (3768617943).

7872163209 is a wasteful number, since it uses less digits than its factorization.

7872163209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557 (or 9554 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 7872163209 is about 88725.2118002544. The cubic root of 7872163209 is about 1989.2896809993.

The spelling of 7872163209 in words is "seven billion, eight hundred seventy-two million, one hundred sixty-three thousand, two hundred nine".