28164484609 has 4 divisors (see below), whose sum is σ = 28851423300. Its totient is φ = 27477545920.

The previous prime is 28164484573. The next prime is 28164484631. The reversal of 28164484609 is 90648446182.

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 14041539009 + 14122945600 = 118497^2 + 118840^2 .

It is a cyclic number.

It is not a de Polignac number, because 28164484609 - 2¹¹ = 28164482561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28164484679) 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 in 3 ways as a sum of consecutive naturals, for example, 343469284 + ... + 343469365.

It is an arithmetic number, because the mean of its divisors is an integer number (7212855825).

Almost surely, 2^28164484609 is an apocalyptic number.

It is an amenable number.

28164484609 is a deficient number, since it is larger than the sum of its proper divisors (686938691).

28164484609 is an equidigital number, since it uses as much as digits as its factorization.

28164484609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686938690.

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 28164484609 in words is "twenty-eight billion, one hundred sixty-four million, four hundred eighty-four thousand, six hundred nine".