12605843689 has 8 divisors (see below), whose sum is σ = 13777924608. Its totient is φ = 11481602880.

The previous prime is 12605843659. The next prime is 12605843711. The reversal of 12605843689 is 98634850621.

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 12605843689 - 2¹¹ = 12605841641 is a prime.

It is a super-2 number, since 2×12605843689² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12605843659) 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, 11959477 + ... + 11960530.

It is an arithmetic number, because the mean of its divisors is an integer number (1722240576).

Almost surely, 2^12605843689 is an apocalyptic number.

It is an amenable number.

12605843689 is a deficient number, since it is larger than the sum of its proper divisors (1172080919).

12605843689 is a wasteful number, since it uses less digits than its factorization.

12605843689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23920055.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 12605843689 in words is "twelve billion, six hundred five million, eight hundred forty-three thousand, six hundred eighty-nine".