6855321651 has 4 divisors (see below), whose sum is σ = 9140428872. Its totient is φ = 4570214432.

The previous prime is 6855321607. The next prime is 6855321667. The reversal of 6855321651 is 1561235586.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6855321651 - 2¹⁰ = 6855320627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6855321601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142553606 + ... + 1142553611.

It is an arithmetic number, because the mean of its divisors is an integer number (2285107218).

Almost surely, 2^6855321651 is an apocalyptic number.

6855321651 is a deficient number, since it is larger than the sum of its proper divisors (2285107221).

6855321651 is a wasteful number, since it uses less digits than its factorization.

6855321651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285107220.

The product of its digits is 216000, while the sum is 42.

The square root of 6855321651 is about 82796.8698140214. The cubic root of 6855321651 is about 1899.6602948533.

The spelling of 6855321651 in words is "six billion, eight hundred fifty-five million, three hundred twenty-one thousand, six hundred fifty-one".