11436025521 has 4 divisors (see below), whose sum is σ = 15248034032. Its totient is φ = 7624017012.

The previous prime is 11436025507. The next prime is 11436025529. The reversal of 11436025521 is 12552063411.

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 11436025521 - 2²⁵ = 11402471089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11436025529) 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, 1906004251 + ... + 1906004256.

It is an arithmetic number, because the mean of its divisors is an integer number (3812008508).

Almost surely, 2^11436025521 is an apocalyptic number.

It is an amenable number.

11436025521 is a deficient number, since it is larger than the sum of its proper divisors (3812008511).

11436025521 is an equidigital number, since it uses as much as digits as its factorization.

11436025521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3812008510.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 11436025521 its reverse (12552063411), we get a palindrome (23988088932).

The spelling of 11436025521 in words is "eleven billion, four hundred thirty-six million, twenty-five thousand, five hundred twenty-one".