12225542645 has 4 divisors (see below), whose sum is σ = 14670651180. Its totient is φ = 9780434112.

The previous prime is 12225542617. The next prime is 12225542669. The reversal of 12225542645 is 54624552221.

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 7259380804 + 4966161841 = 85202^2 + 70471^2 .

It is a cyclic number.

It is not a de Polignac number, because 12225542645 - 2⁸ = 12225542389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12225542599 and 12225542608.

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, 1222554260 + ... + 1222554269.

It is an arithmetic number, because the mean of its divisors is an integer number (3667662795).

Almost surely, 2^12225542645 is an apocalyptic number.

It is an amenable number.

12225542645 is a deficient number, since it is larger than the sum of its proper divisors (2445108535).

12225542645 is an equidigital number, since it uses as much as digits as its factorization.

12225542645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445108534.

The product of its digits is 192000, while the sum is 38.

The spelling of 12225542645 in words is "twelve billion, two hundred twenty-five million, five hundred forty-two thousand, six hundred forty-five".