28515193533 has 16 divisors (see below), whose sum is σ = 42335991040. Its totient is φ = 18969062112.

The previous prime is 28515193463. The next prime is 28515193547. The reversal of 28515193533 is 33539151582.

28515193533 is a `hidden beast` number, since 2 + 85 + 1 + 519 + 3 + 53 + 3 = 666.

It is not a de Polignac number, because 28515193533 - 2¹⁰ = 28515192509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28515193433) 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 15 ways as a sum of consecutive naturals, for example, 1128016 + ... + 1153017.

It is an arithmetic number, because the mean of its divisors is an integer number (2645999440).

Almost surely, 2^28515193533 is an apocalyptic number.

It is an amenable number.

28515193533 is a deficient number, since it is larger than the sum of its proper divisors (13820797507).

28515193533 is a wasteful number, since it uses less digits than its factorization.

28515193533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281505 (or 2281499 counting only the distinct ones).

The product of its digits is 486000, while the sum is 45.

The spelling of 28515193533 in words is "twenty-eight billion, five hundred fifteen million, one hundred ninety-three thousand, five hundred thirty-three".