12823205645 has 16 divisors (see below), whose sum is σ = 16431966720. Its totient is φ = 9585307200.

The previous prime is 12823205579. The next prime is 12823205657. The reversal of 12823205645 is 54650232821.

It is a happy number.

It is not a de Polignac number, because 12823205645 - 2²⁶ = 12756096781 is a prime.

It is a super-3 number, since 3×12823205645³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12823205599 and 12823205608.

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, 1421891 + ... + 1430880.

It is an arithmetic number, because the mean of its divisors is an integer number (1026997920).

Almost surely, 2^12823205645 is an apocalyptic number.

It is an amenable number.

12823205645 is a deficient number, since it is larger than the sum of its proper divisors (3608761075).

12823205645 is a wasteful number, since it uses less digits than its factorization.

12823205645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852836.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 12823205645 in words is "twelve billion, eight hundred twenty-three million, two hundred five thousand, six hundred forty-five".