12664122145 has 8 divisors (see below), whose sum is σ = 15198607656. Its totient is φ = 10130190336.

The previous prime is 12664122071. The next prime is 12664122157. The reversal of 12664122145 is 54122146621.

It can be written as a sum of positive squares in 4 ways, for example, as 3816274176 + 8847847969 = 61776^2 + 94063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12664122145 - 2⁷ = 12664122017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12664122145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86322 + ... + 181051.

It is an arithmetic number, because the mean of its divisors is an integer number (1899825957).

Almost surely, 2^12664122145 is an apocalyptic number.

It is an amenable number.

12664122145 is a deficient number, since it is larger than the sum of its proper divisors (2534485511).

12664122145 is an equidigital number, since it uses as much as digits as its factorization.

12664122145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276851.

The product of its digits is 23040, while the sum is 34.

Adding to 12664122145 its reverse (54122146621), we get a palindrome (66786268766).

The spelling of 12664122145 in words is "twelve billion, six hundred sixty-four million, one hundred twenty-two thousand, one hundred forty-five".