12823697545 has 4 divisors (see below), whose sum is σ = 15388437060. Its totient is φ = 10258958032.

The previous prime is 12823697539. The next prime is 12823697561. The reversal of 12823697545 is 54579632821.

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 2306784841 + 10516912704 = 48029^2 + 102552^2 .

It is a cyclic number.

It is not a de Polignac number, because 12823697545 - 2¹⁷ = 12823566473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12823697492 and 12823697501.

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, 1282369750 + ... + 1282369759.

It is an arithmetic number, because the mean of its divisors is an integer number (3847109265).

Almost surely, 2^12823697545 is an apocalyptic number.

It is an amenable number.

12823697545 is a deficient number, since it is larger than the sum of its proper divisors (2564739515).

12823697545 is an equidigital number, since it uses as much as digits as its factorization.

12823697545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564739514.

The product of its digits is 3628800, while the sum is 52.

The spelling of 12823697545 in words is "twelve billion, eight hundred twenty-three million, six hundred ninety-seven thousand, five hundred forty-five".