12318522655 has 4 divisors (see below), whose sum is σ = 14782227192. Its totient is φ = 9854818120.

The previous prime is 12318522641. The next prime is 12318522683. The reversal of 12318522655 is 55622581321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12318522655 - 2⁹ = 12318522143 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231852261 + ... + 1231852270.

It is an arithmetic number, because the mean of its divisors is an integer number (3695556798).

Almost surely, 2^12318522655 is an apocalyptic number.

12318522655 is a deficient number, since it is larger than the sum of its proper divisors (2463704537).

12318522655 is an equidigital number, since it uses as much as digits as its factorization.

12318522655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2463704536.

The product of its digits is 144000, while the sum is 40.

The spelling of 12318522655 in words is "twelve billion, three hundred eighteen million, five hundred twenty-two thousand, six hundred fifty-five".