28550581711 has 4 divisors (see below), whose sum is σ = 30230027712. Its totient is φ = 26871135712.

The previous prime is 28550581679. The next prime is 28550581729. The reversal of 28550581711 is 11718505582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28550581711 - 2⁵ = 28550581679 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 (28550581771) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 839722975 + ... + 839723008.

It is an arithmetic number, because the mean of its divisors is an integer number (7557506928).

Almost surely, 2^28550581711 is an apocalyptic number.

28550581711 is a deficient number, since it is larger than the sum of its proper divisors (1679446001).

28550581711 is a wasteful number, since it uses less digits than its factorization.

28550581711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679446000.

The product of its (nonzero) digits is 112000, while the sum is 43.

The spelling of 28550581711 in words is "twenty-eight billion, five hundred fifty million, five hundred eighty-one thousand, seven hundred eleven".