161065552329841 has 2 divisors, whose sum is σ = 161065552329842. Its totient is φ = 161065552329840.

The previous prime is 161065552329839. The next prime is 161065552329881. The reversal of 161065552329841 is 148923255560161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155069836911616 + 5995715418225 = 12452704^2 + 2448615^2 .

It is a cyclic number.

It is not a de Polignac number, because 161065552329841 - 2¹ = 161065552329839 is a prime.

It is a super-2 number, since 2×161065552329841² (a number of 29 digits) contains 22 as substring.

Together with 161065552329839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161065552329881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80532776164920 + 80532776164921.

It is an arithmetic number, because the mean of its divisors is an integer number (80532776164921).

Almost surely, 2^{161065552329841} is an apocalyptic number.

It is an amenable number.

161065552329841 is a deficient number, since it is larger than the sum of its proper divisors (1).

161065552329841 is an equidigital number, since it uses as much as digits as its factorization.

161065552329841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552000, while the sum is 58.

The spelling of 161065552329841 in words is "one hundred sixty-one trillion, sixty-five billion, five hundred fifty-two million, three hundred twenty-nine thousand, eight hundred forty-one".