28091616353 has 4 divisors (see below), whose sum is σ = 28096518660. Its totient is φ = 28086714048.

The previous prime is 28091616331. The next prime is 28091616373. The reversal of 28091616353 is 35361619082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8304130129 + 19787486224 = 91127^2 + 140668^2 .

It is a cyclic number.

It is not a de Polignac number, because 28091616353 - 2¹⁰ = 28091615329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28091616373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2442548 + ... + 2454021.

It is an arithmetic number, because the mean of its divisors is an integer number (7024129665).

Almost surely, 2^28091616353 is an apocalyptic number.

It is an amenable number.

28091616353 is a deficient number, since it is larger than the sum of its proper divisors (4902307).

28091616353 is an equidigital number, since it uses as much as digits as its factorization.

28091616353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4902306.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 28091616353 in words is "twenty-eight billion, ninety-one million, six hundred sixteen thousand, three hundred fifty-three".