1322613542561 has 2 divisors, whose sum is σ = 1322613542562. Its totient is φ = 1322613542560.

The previous prime is 1322613542543. The next prime is 1322613542563. The reversal of 1322613542561 is 1652453162231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1322454000400 + 159542161 = 1149980^2 + 12631^2 .

It is an emirp because it is prime and its reverse (1652453162231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1322613542561 - 2¹⁴ = 1322613526177 is a prime.

Together with 1322613542563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1322613542563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661306771280 + 661306771281.

It is an arithmetic number, because the mean of its divisors is an integer number (661306771281).

Almost surely, 2^{1322613542561} is an apocalyptic number.

It is an amenable number.

1322613542561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322613542561 is an equidigital number, since it uses as much as digits as its factorization.

1322613542561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 41.

The spelling of 1322613542561 in words is "one trillion, three hundred twenty-two billion, six hundred thirteen million, five hundred forty-two thousand, five hundred sixty-one".