12406204478345 has 4 divisors (see below), whose sum is σ = 14887445374020. Its totient is φ = 9924963582672.

The previous prime is 12406204478299. The next prime is 12406204478413. The reversal of 12406204478345 is 54387440260421.

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 7294169395984 + 5112035082361 = 2700772^2 + 2260981^2 .

It is a cyclic number.

It is not a de Polignac number, because 12406204478345 - 2¹⁰ = 12406204477321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12406204478293 and 12406204478302.

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, 1240620447830 + ... + 1240620447839.

It is an arithmetic number, because the mean of its divisors is an integer number (3721861343505).

Almost surely, 2^{12406204478345} is an apocalyptic number.

It is an amenable number.

12406204478345 is a deficient number, since it is larger than the sum of its proper divisors (2481240895675).

12406204478345 is an equidigital number, since it uses as much as digits as its factorization.

12406204478345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481240895674.

The product of its (nonzero) digits is 5160960, while the sum is 50.

The spelling of 12406204478345 in words is "twelve trillion, four hundred six billion, two hundred four million, four hundred seventy-eight thousand, three hundred forty-five".