12657450653 has 2 divisors, whose sum is σ = 12657450654. Its totient is φ = 12657450652.

The previous prime is 12657450607. The next prime is 12657450661. The reversal of 12657450653 is 35605475621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7835259289 + 4822191364 = 88517^2 + 69442^2 .

It is an emirp because it is prime and its reverse (35605475621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12657450653 - 2²⁶ = 12590341789 is a prime.

It is a super-2 number, since 2×12657450653² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12657450353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328725326 + 6328725327.

It is an arithmetic number, because the mean of its divisors is an integer number (6328725327).

Almost surely, 2^12657450653 is an apocalyptic number.

It is an amenable number.

12657450653 is a deficient number, since it is larger than the sum of its proper divisors (1).

12657450653 is an equidigital number, since it uses as much as digits as its factorization.

12657450653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 12657450653 in words is "twelve billion, six hundred fifty-seven million, four hundred fifty thousand, six hundred fifty-three".