161363693441 has 2 divisors, whose sum is σ = 161363693442. Its totient is φ = 161363693440.

The previous prime is 161363693437. The next prime is 161363693443. The reversal of 161363693441 is 144396363161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80696333041 + 80667360400 = 284071^2 + 284020^2 .

It is an emirp because it is prime and its reverse (144396363161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161363693441 - 2² = 161363693437 is a prime.

Together with 161363693443, 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 (161363693443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80681846720 + 80681846721.

It is an arithmetic number, because the mean of its divisors is an integer number (80681846721).

Almost surely, 2^161363693441 is an apocalyptic number.

It is an amenable number.

161363693441 is a deficient number, since it is larger than the sum of its proper divisors (1).

161363693441 is an equidigital number, since it uses as much as digits as its factorization.

161363693441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 47.

The spelling of 161363693441 in words is "one hundred sixty-one billion, three hundred sixty-three million, six hundred ninety-three thousand, four hundred forty-one".