6855832621 has 16 divisors (see below), whose sum is σ = 7728754176. Its totient is φ = 6031236000.

The previous prime is 6855832583. The next prime is 6855832651. The reversal of 6855832621 is 1262385586.

6855832621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6855832621 - 2¹¹ = 6855830573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6855832651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317241 + ... + 338161.

It is an arithmetic number, because the mean of its divisors is an integer number (483047136).

Almost surely, 2^6855832621 is an apocalyptic number.

It is an amenable number.

6855832621 is a deficient number, since it is larger than the sum of its proper divisors (872921555).

6855832621 is an equidigital number, since it uses as much as digits as its factorization.

6855832621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21025 (or 20963 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The square root of 6855832621 is about 82799.9554408093. The cubic root of 6855832621 is about 1899.7074915352.

The spelling of 6855832621 in words is "six billion, eight hundred fifty-five million, eight hundred thirty-two thousand, six hundred twenty-one".