12647240653 has 2 divisors, whose sum is σ = 12647240654. Its totient is φ = 12647240652.

The previous prime is 12647240651. The next prime is 12647240681. The reversal of 12647240653 is 35604274621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12592879524 + 54361129 = 112218^2 + 7373^2 .

It is a cyclic number.

It is not a de Polignac number, because 12647240653 - 2¹ = 12647240651 is a prime.

It is a super-2 number, since 2×12647240653² (a number of 21 digits) contains 22 as substring.

Together with 12647240651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12647240651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6323620326 + 6323620327.

It is an arithmetic number, because the mean of its divisors is an integer number (6323620327).

Almost surely, 2^12647240653 is an apocalyptic number.

It is an amenable number.

12647240653 is a deficient number, since it is larger than the sum of its proper divisors (1).

12647240653 is an equidigital number, since it uses as much as digits as its factorization.

12647240653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 12647240653 in words is "twelve billion, six hundred forty-seven million, two hundred forty thousand, six hundred fifty-three".