28559644105 has 8 divisors (see below), whose sum is σ = 36287547912. Its totient is φ = 21503731968.

The previous prime is 28559644063. The next prime is 28559644159. The reversal of 28559644105 is 50144695582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14916469689 + 13643174416 = 122133^2 + 116804^2 .

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 28559644105 - 2¹⁷ = 28559513033 is a prime.

It is a super-2 number, since 2×28559644105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 167997822 + ... + 167997991.

It is an arithmetic number, because the mean of its divisors is an integer number (4535943489).

Almost surely, 2^28559644105 is an apocalyptic number.

It is an amenable number.

28559644105 is a deficient number, since it is larger than the sum of its proper divisors (7727903807).

28559644105 is a wasteful number, since it uses less digits than its factorization.

28559644105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335995835.

The product of its (nonzero) digits is 1728000, while the sum is 49.

The spelling of 28559644105 in words is "twenty-eight billion, five hundred fifty-nine million, six hundred forty-four thousand, one hundred five".