11528242585 has 4 divisors (see below), whose sum is σ = 13833891108. Its totient is φ = 9222594064.

The previous prime is 11528242573. The next prime is 11528242591. The reversal of 11528242585 is 58524282511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58524282511 = 31 ⋅1887880081.

It can be written as a sum of positive squares in 2 ways, for example, as 8978699536 + 2549543049 = 94756^2 + 50493^2 .

It is a cyclic number.

It is not a de Polignac number, because 11528242585 - 2⁵ = 11528242553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1152824254 + ... + 1152824263.

It is an arithmetic number, because the mean of its divisors is an integer number (3458472777).

Almost surely, 2^11528242585 is an apocalyptic number.

It is an amenable number.

11528242585 is a deficient number, since it is larger than the sum of its proper divisors (2305648523).

11528242585 is an equidigital number, since it uses as much as digits as its factorization.

11528242585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305648522.

The product of its digits is 256000, while the sum is 43.

The spelling of 11528242585 in words is "eleven billion, five hundred twenty-eight million, two hundred forty-two thousand, five hundred eighty-five".