6821808602 has 64 divisors (see below), whose sum is σ = 13259980800. Its totient is φ = 2563799040.

The previous prime is 6821808601. The next prime is 6821808607. The reversal of 6821808602 is 2068081286.

It is a self number, because there is not a number n which added to its sum of digits gives 6821808602.

It is not an unprimeable number, because it can be changed into a prime (6821808601) 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 31 ways as a sum of consecutive naturals, for example, 171674 + ... + 207642.

It is an arithmetic number, because the mean of its divisors is an integer number (207187200).

Almost surely, 2^6821808602 is an apocalyptic number.

6821808602 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6821808602 is a deficient number, since it is larger than the sum of its proper divisors (6438172198).

6821808602 is a wasteful number, since it uses less digits than its factorization.

6821808602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36051.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 6821808602 is about 82594.2407314215. The cubic root of 6821808602 is about 1896.5596655664.

Adding to 6821808602 its reverse (2068081286), we get a palindrome (8889889888).

The spelling of 6821808602 in words is "six billion, eight hundred twenty-one million, eight hundred eight thousand, six hundred two".