6853869909 has 12 divisors (see below), whose sum is σ = 10039472352. Its totient is φ = 4504890600.

The previous prime is 6853869901. The next prime is 6853869931. The reversal of 6853869909 is 9099683586.

6853869909 is a `hidden beast` number, since 6 + 8 + 538 + 6 + 9 + 90 + 9 = 666.

It is not a de Polignac number, because 6853869909 - 2³ = 6853869901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6853869901) 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, 5362327 + ... + 5363604.

It is an arithmetic number, because the mean of its divisors is an integer number (836622696).

Almost surely, 2^6853869909 is an apocalyptic number.

It is an amenable number.

6853869909 is a deficient number, since it is larger than the sum of its proper divisors (3185602443).

6853869909 is a wasteful number, since it uses less digits than its factorization.

6853869909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10726008 (or 10726005 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The square root of 6853869909 is about 82788.1024604381. The cubic root of 6853869909 is about 1899.5261892406.

The spelling of 6853869909 in words is "six billion, eight hundred fifty-three million, eight hundred sixty-nine thousand, nine hundred nine".