12340278845 has 4 divisors (see below), whose sum is σ = 14808334620. Its totient is φ = 9872223072.

The previous prime is 12340278827. The next prime is 12340278857. The reversal of 12340278845 is 54887204321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7622512249 + 4717766596 = 87307^2 + 68686^2 .

It is a cyclic number.

It is not a de Polignac number, because 12340278845 - 2¹⁰ = 12340277821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12340278796 and 12340278805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1234027880 + ... + 1234027889.

It is an arithmetic number, because the mean of its divisors is an integer number (3702083655).

Almost surely, 2^12340278845 is an apocalyptic number.

It is an amenable number.

12340278845 is a deficient number, since it is larger than the sum of its proper divisors (2468055775).

12340278845 is an equidigital number, since it uses as much as digits as its factorization.

12340278845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468055774.

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 12340278845 in words is "twelve billion, three hundred forty million, two hundred seventy-eight thousand, eight hundred forty-five".