12823825565 has 16 divisors (see below), whose sum is σ = 15481882416. Its totient is φ = 10196928000.

The previous prime is 12823825541. The next prime is 12823825571. The reversal of 12823825565 is 56552832821.

It can be written as a sum of positive squares in 8 ways, for example, as 1445976676 + 11377848889 = 38026^2 + 106667^2 .

It is not a de Polignac number, because 12823825565 - 2¹² = 12823821469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3050465 + ... + 3054665.

It is an arithmetic number, because the mean of its divisors is an integer number (967617651).

Almost surely, 2^12823825565 is an apocalyptic number.

It is an amenable number.

12823825565 is a deficient number, since it is larger than the sum of its proper divisors (2658056851).

12823825565 is a wasteful number, since it uses less digits than its factorization.

12823825565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7760.

The product of its digits is 1152000, while the sum is 47.

The spelling of 12823825565 in words is "twelve billion, eight hundred twenty-three million, eight hundred twenty-five thousand, five hundred sixty-five".