11522985523 has 4 divisors (see below), whose sum is σ = 13169126320. Its totient is φ = 9876844728.

The previous prime is 11522985521. The next prime is 11522985527. The reversal of 11522985523 is 32558922511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32558922511 = 2273 ⋅14324207.

It is a cyclic number.

It is not a de Polignac number, because 11522985523 - 2¹ = 11522985521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11522985523.

It is not an unprimeable number, because it can be changed into a prime (11522985521) 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, 823070388 + ... + 823070401.

It is an arithmetic number, because the mean of its divisors is an integer number (3292281580).

Almost surely, 2^11522985523 is an apocalyptic number.

11522985523 is a deficient number, since it is larger than the sum of its proper divisors (1646140797).

11522985523 is an equidigital number, since it uses as much as digits as its factorization.

11522985523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646140796.

The product of its digits is 216000, while the sum is 43.

The spelling of 11522985523 in words is "eleven billion, five hundred twenty-two million, nine hundred eighty-five thousand, five hundred twenty-three".