28149775535 has 24 divisors (see below), whose sum is σ = 40649791680. Its totient is φ = 18637088064.

The previous prime is 28149775517. The next prime is 28149775571. The reversal of 28149775535 is 53557794182.

It is not a de Polignac number, because 28149775535 - 2¹⁰ = 28149774511 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1973879 + ... + 1988088.

It is an arithmetic number, because the mean of its divisors is an integer number (1693741320).

Almost surely, 2^28149775535 is an apocalyptic number.

28149775535 is a deficient number, since it is larger than the sum of its proper divisors (12500016145).

28149775535 is a wasteful number, since it uses less digits than its factorization.

28149775535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962015 (or 3962008 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 56.

The spelling of 28149775535 in words is "twenty-eight billion, one hundred forty-nine million, seven hundred seventy-five thousand, five hundred thirty-five".