12684459701 has 4 divisors (see below), whose sum is σ = 12703308012. Its totient is φ = 12665611392.

The previous prime is 12684459607. The next prime is 12684459703. The reversal of 12684459701 is 10795448621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10795448621 = 29 ⋅372256849.

It can be written as a sum of positive squares in 2 ways, for example, as 5215006225 + 7469453476 = 72215^2 + 86426^2 .

It is a cyclic number.

It is not a de Polignac number, because 12684459701 - 2²² = 12680265397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12684459703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9423146 + ... + 9424491.

It is an arithmetic number, because the mean of its divisors is an integer number (3175827003).

Almost surely, 2^12684459701 is an apocalyptic number.

It is an amenable number.

12684459701 is a deficient number, since it is larger than the sum of its proper divisors (18848311).

12684459701 is an equidigital number, since it uses as much as digits as its factorization.

12684459701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18848310.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 12684459701 in words is "twelve billion, six hundred eighty-four million, four hundred fifty-nine thousand, seven hundred one".