12647837872849 has 2 divisors, whose sum is σ = 12647837872850. Its totient is φ = 12647837872848.

The previous prime is 12647837872841. The next prime is 12647837872889. The reversal of 12647837872849 is 94827873874621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9645571255824 + 3002266617025 = 3105732^2 + 1732705^2 .

It is a cyclic number.

It is not a de Polignac number, because 12647837872849 - 2³ = 12647837872841 is a prime.

It is not a weakly prime, because it can be changed into another prime (12647837872841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6323918936424 + 6323918936425.

It is an arithmetic number, because the mean of its divisors is an integer number (6323918936425).

Almost surely, 2^{12647837872849} is an apocalyptic number.

It is an amenable number.

12647837872849 is a deficient number, since it is larger than the sum of its proper divisors (1).

12647837872849 is an equidigital number, since it uses as much as digits as its factorization.

12647837872849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1820786688, while the sum is 76.

The spelling of 12647837872849 in words is "twelve trillion, six hundred forty-seven billion, eight hundred thirty-seven million, eight hundred seventy-two thousand, eight hundred forty-nine".