12823220657 has 8 divisors (see below), whose sum is σ = 14043684480. Its totient is φ = 11636194320.

The previous prime is 12823220653. The next prime is 12823220741. The reversal of 12823220657 is 75602232821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12823220657 - 2² = 12823220653 is a prime.

It is a super-2 number, since 2×12823220657² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12823220657.

It is not an unprimeable number, because it can be changed into a prime (12823220653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8358569 + ... + 8360102.

It is an arithmetic number, because the mean of its divisors is an integer number (1755460560).

Almost surely, 2^12823220657 is an apocalyptic number.

It is an amenable number.

12823220657 is a deficient number, since it is larger than the sum of its proper divisors (1220463823).

12823220657 is a wasteful number, since it uses less digits than its factorization.

12823220657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16718743.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 12823220657 in words is "twelve billion, eight hundred twenty-three million, two hundred twenty thousand, six hundred fifty-seven".