28033766737885 has 4 divisors (see below), whose sum is σ = 33640520085468. Its totient is φ = 22427013390304.

The previous prime is 28033766737787. The next prime is 28033766737957. The reversal of 28033766737885 is 58873766733082.

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 5959950572601 + 22073816165284 = 2441301^2 + 4698278^2 .

It is a cyclic number.

It is not a de Polignac number, because 28033766737885 - 2¹³ = 28033766729693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2803376673784 + ... + 2803376673793.

It is an arithmetic number, because the mean of its divisors is an integer number (8410130021367).

Almost surely, 2^{28033766737885} is an apocalyptic number.

It is an amenable number.

28033766737885 is a deficient number, since it is larger than the sum of its proper divisors (5606753347583).

28033766737885 is an equidigital number, since it uses as much as digits as its factorization.

28033766737885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606753347582.

The product of its (nonzero) digits is 1706987520, while the sum is 73.

The spelling of 28033766737885 in words is "twenty-eight trillion, thirty-three billion, seven hundred sixty-six million, seven hundred thirty-seven thousand, eight hundred eighty-five".