161313443654513 has 2 divisors, whose sum is σ = 161313443654514. Its totient is φ = 161313443654512.

The previous prime is 161313443654371. The next prime is 161313443654527. The reversal of 161313443654513 is 315456344313161.

161313443654513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100825135133584 + 60488308520929 = 10041172^2 + 7777423^2 .

It is a cyclic number.

It is not a de Polignac number, because 161313443654513 - 2¹⁰ = 161313443653489 is a prime.

It is not a weakly prime, because it can be changed into another prime (161313443654813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80656721827256 + 80656721827257.

It is an arithmetic number, because the mean of its divisors is an integer number (80656721827257).

Almost surely, 2^{161313443654513} is an apocalyptic number.

It is an amenable number.

161313443654513 is a deficient number, since it is larger than the sum of its proper divisors (1).

161313443654513 is an equidigital number, since it uses as much as digits as its factorization.

161313443654513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 50.

Adding to 161313443654513 its reverse (315456344313161), we get a palindrome (476769787967674).

The spelling of 161313443654513 in words is "one hundred sixty-one trillion, three hundred thirteen billion, four hundred forty-three million, six hundred fifty-four thousand, five hundred thirteen".