11523455321 has 32 divisors (see below), whose sum is σ = 14129676288. Its totient is φ = 9173341440.

The previous prime is 11523455311. The next prime is 11523455323. The reversal of 11523455321 is 12355432511.

It is a de Polignac number, because none of the positive numbers 2^k-11523455321 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11523455323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3810416 + ... + 3813438.

It is an arithmetic number, because the mean of its divisors is an integer number (441552384).

Almost surely, 2^11523455321 is an apocalyptic number.

It is an amenable number.

11523455321 is a deficient number, since it is larger than the sum of its proper divisors (2606220967).

11523455321 is a wasteful number, since it uses less digits than its factorization.

11523455321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461.

The product of its digits is 18000, while the sum is 32.

Adding to 11523455321 its reverse (12355432511), we get a palindrome (23878887832).

The spelling of 11523455321 in words is "eleven billion, five hundred twenty-three million, four hundred fifty-five thousand, three hundred twenty-one".