28835716691 has 2 divisors, whose sum is σ = 28835716692. Its totient is φ = 28835716690.

The previous prime is 28835716673. The next prime is 28835716717. The reversal of 28835716691 is 19661753882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28835716691 - 2¹⁴ = 28835700307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28835716291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14417858345 + 14417858346.

It is an arithmetic number, because the mean of its divisors is an integer number (14417858346).

Almost surely, 2^28835716691 is an apocalyptic number.

28835716691 is a deficient number, since it is larger than the sum of its proper divisors (1).

28835716691 is an equidigital number, since it uses as much as digits as its factorization.

28835716691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The spelling of 28835716691 in words is "twenty-eight billion, eight hundred thirty-five million, seven hundred sixteen thousand, six hundred ninety-one".