28611008213 has 2 divisors, whose sum is σ = 28611008214. Its totient is φ = 28611008212.

The previous prime is 28611008207. The next prime is 28611008243. The reversal of 28611008213 is 31280011682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24679467409 + 3931540804 = 157097^2 + 62702^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28611008213 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28611008213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28611008243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14305504106 + 14305504107.

It is an arithmetic number, because the mean of its divisors is an integer number (14305504107).

Almost surely, 2^28611008213 is an apocalyptic number.

It is an amenable number.

28611008213 is a deficient number, since it is larger than the sum of its proper divisors (1).

28611008213 is an equidigital number, since it uses as much as digits as its factorization.

28611008213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

Adding to 28611008213 its reverse (31280011682), we get a palindrome (59891019895).

The spelling of 28611008213 in words is "twenty-eight billion, six hundred eleven million, eight thousand, two hundred thirteen".