6821628001 has 2 divisors, whose sum is σ = 6821628002. Its totient is φ = 6821628000.

The previous prime is 6821627993. The next prime is 6821628017. The reversal of 6821628001 is 1008261286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4647830625 + 2173797376 = 68175^2 + 46624^2 .

It is a cyclic number.

It is not a de Polignac number, because 6821628001 - 2³ = 6821627993 is a prime.

It is not a weakly prime, because it can be changed into another prime (6821628071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3410814000 + 3410814001.

It is an arithmetic number, because the mean of its divisors is an integer number (3410814001).

Almost surely, 2^6821628001 is an apocalyptic number.

It is an amenable number.

6821628001 is a deficient number, since it is larger than the sum of its proper divisors (1).

6821628001 is an equidigital number, since it uses as much as digits as its factorization.

6821628001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 6821628001 is about 82593.1474215628. The cubic root of 6821628001 is about 1896.5429288711.

Adding to 6821628001 its reverse (1008261286), we get a palindrome (7829889287).

The spelling of 6821628001 in words is "six billion, eight hundred twenty-one million, six hundred twenty-eight thousand, one".