28360566533 has 4 divisors (see below), whose sum is σ = 30542148588. Its totient is φ = 26178984480.

The previous prime is 28360566517. The next prime is 28360566541. The reversal of 28360566533 is 33566506382.

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 6521047009 + 21839519524 = 80753^2 + 147782^2 .

It is a cyclic number.

It is not a de Polignac number, because 28360566533 - 2⁴ = 28360566517 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 (28360566583) 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, 1090791008 + ... + 1090791033.

It is an arithmetic number, because the mean of its divisors is an integer number (7635537147).

Almost surely, 2^28360566533 is an apocalyptic number.

It is an amenable number.

28360566533 is a deficient number, since it is larger than the sum of its proper divisors (2181582055).

28360566533 is a wasteful number, since it uses less digits than its factorization.

28360566533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181582054.

The product of its (nonzero) digits is 2332800, while the sum is 47.

The spelling of 28360566533 in words is "twenty-eight billion, three hundred sixty million, five hundred sixty-six thousand, five hundred thirty-three".