28164604916449 has 8 divisors (see below), whose sum is σ = 29685530232360. Its totient is φ = 26680328403456.

The previous prime is 28164604916443. The next prime is 28164604916531. The reversal of 28164604916449 is 94461940646182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7552641714849 + 20611963201600 = 2748207^2 + 4540040^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28164604916449 - 2²⁹ = 28164068045537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28164604916443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9162199152 + ... + 9162202225.

It is an arithmetic number, because the mean of its divisors is an integer number (3710691279045).

Almost surely, 2^{28164604916449} is an apocalyptic number.

28164604916449 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28164604916449 is a deficient number, since it is larger than the sum of its proper divisors (1520925315911).

28164604916449 is a wasteful number, since it uses less digits than its factorization.

28164604916449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18324401459.

The product of its (nonzero) digits is 71663616, while the sum is 64.

The spelling of 28164604916449 in words is "twenty-eight trillion, one hundred sixty-four billion, six hundred four million, nine hundred sixteen thousand, four hundred forty-nine".