12684349617 has 16 divisors (see below), whose sum is σ = 17239909440. Its totient is φ = 8293614912.

The previous prime is 12684349609. The next prime is 12684349619. The reversal of 12684349617 is 71694348621.

It is a happy number.

It is not a de Polignac number, because 12684349617 - 2³ = 12684349609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12684349617.

It is not an unprimeable number, because it can be changed into a prime (12684349619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91758 + ... + 183815.

It is an arithmetic number, because the mean of its divisors is an integer number (1077494340).

Almost surely, 2^12684349617 is an apocalyptic number.

It is an amenable number.

12684349617 is a deficient number, since it is larger than the sum of its proper divisors (4555559823).

12684349617 is a wasteful number, since it uses less digits than its factorization.

12684349617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275872.

The product of its digits is 1741824, while the sum is 51.

The spelling of 12684349617 in words is "twelve billion, six hundred eighty-four million, three hundred forty-nine thousand, six hundred seventeen".