28210845011009 has 4 divisors (see below), whose sum is σ = 28211953212804. Its totient is φ = 28209736809216.

The previous prime is 28210845010993. The next prime is 28210845011057. The reversal of 28210845011009 is 90011054801282.

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 10517717068609 + 17693127942400 = 3243103^2 + 4206320^2 .

It is a cyclic number.

It is not a de Polignac number, because 28210845011009 - 2⁴ = 28210845010993 is a prime.

It is a super-3 number, since 3×28210845011009³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28210845011509) 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, 554062712 + ... + 554113625.

It is an arithmetic number, because the mean of its divisors is an integer number (7052988303201).

Almost surely, 2^{28210845011009} is an apocalyptic number.

It is an amenable number.

28210845011009 is a deficient number, since it is larger than the sum of its proper divisors (1108201795).

28210845011009 is a wasteful number, since it uses less digits than its factorization.

28210845011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108201794.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 28210845011009 in words is "twenty-eight trillion, two hundred ten billion, eight hundred forty-five million, eleven thousand, nine".