28508258611 has 4 divisors (see below), whose sum is σ = 32580866992. Its totient is φ = 24435650232.

The previous prime is 28508258609. The next prime is 28508258617. The reversal of 28508258611 is 11685280582.

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

It is not a de Polignac number, because 28508258611 - 2¹ = 28508258609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28508258617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2036304180 + ... + 2036304193.

It is an arithmetic number, because the mean of its divisors is an integer number (8145216748).

Almost surely, 2^28508258611 is an apocalyptic number.

28508258611 is a deficient number, since it is larger than the sum of its proper divisors (4072608381).

28508258611 is an equidigital number, since it uses as much as digits as its factorization.

28508258611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4072608380.

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 28508258611 in words is "twenty-eight billion, five hundred eight million, two hundred fifty-eight thousand, six hundred eleven".