28253775533 has 8 divisors (see below), whose sum is σ = 28644415800. Its totient is φ = 27863232768.

The previous prime is 28253775499. The next prime is 28253775547. The reversal of 28253775533 is 33557735282.

It can be written as a sum of positive squares in 4 ways, for example, as 8703583849 + 19550191684 = 93293^2 + 139822^2 .

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 28253775533 - 2⁶ = 28253775469 is a prime.

It is a super-3 number, since 3×28253775533³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253775233) by changing a digit.

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, 711323 + ... + 749991.

It is an arithmetic number, because the mean of its divisors is an integer number (3580551975).

Almost surely, 2^28253775533 is an apocalyptic number.

It is an amenable number.

28253775533 is a deficient number, since it is larger than the sum of its proper divisors (390640267).

28253775533 is a wasteful number, since it uses less digits than its factorization.

28253775533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48751.

The product of its digits is 5292000, while the sum is 50.

The spelling of 28253775533 in words is "twenty-eight billion, two hundred fifty-three million, seven hundred seventy-five thousand, five hundred thirty-three".