28321076663 has 4 divisors (see below), whose sum is σ = 30895720008. Its totient is φ = 25746433320.

The previous prime is 28321076629. The next prime is 28321076671. The reversal of 28321076663 is 36667012382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28321076663 - 2¹⁴ = 28321060279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321076683) 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 in 3 ways as a sum of consecutive naturals, for example, 1287321656 + ... + 1287321677.

It is an arithmetic number, because the mean of its divisors is an integer number (7723930002).

Almost surely, 2^28321076663 is an apocalyptic number.

28321076663 is a deficient number, since it is larger than the sum of its proper divisors (2574643345).

28321076663 is a wasteful number, since it uses less digits than its factorization.

28321076663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574643344.

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 28321076663 in words is "twenty-eight billion, three hundred twenty-one million, seventy-six thousand, six hundred sixty-three".