13424425325561 has 2 divisors, whose sum is σ = 13424425325562. Its totient is φ = 13424425325560.

The previous prime is 13424425325551. The next prime is 13424425325603. The reversal of 13424425325561 is 16552352442431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12604232459536 + 820192866025 = 3550244^2 + 905645^2 .

It is a cyclic number.

It is not a de Polignac number, because 13424425325561 - 2¹⁰ = 13424425324537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13424425325551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6712212662780 + 6712212662781.

It is an arithmetic number, because the mean of its divisors is an integer number (6712212662781).

Almost surely, 2^{13424425325561} is an apocalyptic number.

It is an amenable number.

13424425325561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13424425325561 is an equidigital number, since it uses as much as digits as its factorization.

13424425325561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456000, while the sum is 47.

Adding to 13424425325561 its reverse (16552352442431), we get a palindrome (29976777767992).

The spelling of 13424425325561 in words is "thirteen trillion, four hundred twenty-four billion, four hundred twenty-five million, three hundred twenty-five thousand, five hundred sixty-one".