6871632181209 has 18 divisors (see below), whose sum is σ = 10161889114650. Its totient is φ = 4474551176928.

The previous prime is 6871632181201. The next prime is 6871632181247. The reversal of 6871632181209 is 9021812361786.

6871632181209 is a `hidden beast` number, since 68 + 7 + 163 + 218 + 1 + 209 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5308139523600 + 1563492657609 = 2303940^2 + 1250397^2 .

It is not a de Polignac number, because 6871632181209 - 2³ = 6871632181201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6871632181201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 206450284 + ... + 206483565.

Almost surely, 2^{6871632181209} is an apocalyptic number.

It is an amenable number.

6871632181209 is a deficient number, since it is larger than the sum of its proper divisors (3290256933441).

6871632181209 is a wasteful number, since it uses less digits than its factorization.

6871632181209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412933941 (or 412933895 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 6871632181209 in words is "six trillion, eight hundred seventy-one billion, six hundred thirty-two million, one hundred eighty-one thousand, two hundred nine".