12145345673 has 4 divisors (see below), whose sum is σ = 12145770768. Its totient is φ = 12144920580.

The previous prime is 12145345643. The next prime is 12145345691. The reversal of 12145345673 is 37654354121.

12145345673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 12145345673 - 2¹² = 12145341577 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 12145345673.

It is not an unprimeable number, because it can be changed into a prime (12145345603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166343 + ... + 227948.

It is an arithmetic number, because the mean of its divisors is an integer number (3036442692).

Almost surely, 2^12145345673 is an apocalyptic number.

It is an amenable number.

12145345673 is a deficient number, since it is larger than the sum of its proper divisors (425095).

12145345673 is an equidigital number, since it uses as much as digits as its factorization.

12145345673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425094.

The product of its digits is 302400, while the sum is 41.

Adding to 12145345673 its reverse (37654354121), we get a palindrome (49799699794).

The spelling of 12145345673 in words is "twelve billion, one hundred forty-five million, three hundred forty-five thousand, six hundred seventy-three".