6865852921 has 16 divisors (see below), whose sum is σ = 7173048960. Its totient is φ = 6563589760.

The previous prime is 6865852913. The next prime is 6865852967. The reversal of 6865852921 is 1292585686.

It is a cyclic number.

It is not a de Polignac number, because 6865852921 - 2³ = 6865852913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6865852991) 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 15 ways as a sum of consecutive naturals, for example, 1909101 + ... + 1912693.

It is an arithmetic number, because the mean of its divisors is an integer number (448315560).

Almost surely, 2^6865852921 is an apocalyptic number.

It is an amenable number.

6865852921 is a deficient number, since it is larger than the sum of its proper divisors (307196039).

6865852921 is a wasteful number, since it uses less digits than its factorization.

6865852921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256.

The product of its digits is 2073600, while the sum is 52.

The square root of 6865852921 is about 82860.4424378726. The cubic root of 6865852921 is about 1900.6325614020.

The spelling of 6865852921 in words is "six billion, eight hundred sixty-five million, eight hundred fifty-two thousand, nine hundred twenty-one".