6006563821 has 2 divisors, whose sum is σ = 6006563822. Its totient is φ = 6006563820.

The previous prime is 6006563779. The next prime is 6006563903. The reversal of 6006563821 is 1283656006.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4123437796 + 1883126025 = 64214^2 + 43395^2 .

It is a cyclic number.

It is not a de Polignac number, because 6006563821 - 2¹⁷ = 6006432749 is a prime.

It is a super-2 number, since 2×6006563821² = 72157617871492240082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6006563221) 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 as a sum of consecutive naturals, namely, 3003281910 + 3003281911.

It is an arithmetic number, because the mean of its divisors is an integer number (3003281911).

Almost surely, 2^6006563821 is an apocalyptic number.

It is an amenable number.

6006563821 is a deficient number, since it is larger than the sum of its proper divisors (1).

6006563821 is an equidigital number, since it uses as much as digits as its factorization.

6006563821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 6006563821 is about 77502.0246251671. The cubic root of 6006563821 is about 1817.7829765874.

The spelling of 6006563821 in words is "six billion, six million, five hundred sixty-three thousand, eight hundred twenty-one".