12797596561 has 2 divisors, whose sum is σ = 12797596562. Its totient is φ = 12797596560.

The previous prime is 12797596517. The next prime is 12797596573. The reversal of 12797596561 is 16569579721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12702417025 + 95179536 = 112705^2 + 9756^2 .

It is an emirp because it is prime and its reverse (16569579721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12797596561 - 2¹³ = 12797588369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12797596496 and 12797596505.

It is not a weakly prime, because it can be changed into another prime (12797596061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6398798280 + 6398798281.

It is an arithmetic number, because the mean of its divisors is an integer number (6398798281).

Almost surely, 2^12797596561 is an apocalyptic number.

It is an amenable number.

12797596561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12797596561 is an equidigital number, since it uses as much as digits as its factorization.

12797596561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7144200, while the sum is 58.

The spelling of 12797596561 in words is "twelve billion, seven hundred ninety-seven million, five hundred ninety-six thousand, five hundred sixty-one".