28017819647 has 2 divisors, whose sum is σ = 28017819648. Its totient is φ = 28017819646.

The previous prime is 28017819637. The next prime is 28017819703. The reversal of 28017819647 is 74691871082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28017819647 - 2²⁰ = 28016771071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28017819607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14008909823 + 14008909824.

It is an arithmetic number, because the mean of its divisors is an integer number (14008909824).

Almost surely, 2^28017819647 is an apocalyptic number.

28017819647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28017819647 is an equidigital number, since it uses as much as digits as its factorization.

28017819647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 28017819647 in words is "twenty-eight billion, seventeen million, eight hundred nineteen thousand, six hundred forty-seven".