11528591097 has 4 divisors (see below), whose sum is σ = 15371454800. Its totient is φ = 7685727396.

The previous prime is 11528591083. The next prime is 11528591141. The reversal of 11528591097 is 79019582511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11528591097 - 2⁶ = 11528591033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11528591057) 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, 1921431847 + ... + 1921431852.

It is an arithmetic number, because the mean of its divisors is an integer number (3842863700).

Almost surely, 2^11528591097 is an apocalyptic number.

It is an amenable number.

11528591097 is a deficient number, since it is larger than the sum of its proper divisors (3842863703).

11528591097 is an equidigital number, since it uses as much as digits as its factorization.

11528591097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3842863702.

The product of its (nonzero) digits is 226800, while the sum is 48.

The spelling of 11528591097 in words is "eleven billion, five hundred twenty-eight million, five hundred ninety-one thousand, ninety-seven".