28055586419989 has 2 divisors, whose sum is σ = 28055586419990. Its totient is φ = 28055586419988.

The previous prime is 28055586419983. The next prime is 28055586420019. The reversal of 28055586419989 is 98991468555082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27990977422500 + 64608997489 = 5290650^2 + 254183^2 .

It is a cyclic number.

It is not a de Polignac number, because 28055586419989 - 2³ = 28055586419981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28055586419981) 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, 14027793209994 + 14027793209995.

It is an arithmetic number, because the mean of its divisors is an integer number (14027793209995).

Almost surely, 2^{28055586419989} is an apocalyptic number.

It is an amenable number.

28055586419989 is a deficient number, since it is larger than the sum of its proper divisors (1).

28055586419989 is an equidigital number, since it uses as much as digits as its factorization.

28055586419989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488000, while the sum is 79.

The spelling of 28055586419989 in words is "twenty-eight trillion, fifty-five billion, five hundred eighty-six million, four hundred nineteen thousand, nine hundred eighty-nine".