161617316033 has 2 divisors, whose sum is σ = 161617316034. Its totient is φ = 161617316032.

The previous prime is 161617315991. The next prime is 161617316041. The reversal of 161617316033 is 330613716161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114698723584 + 46918592449 = 338672^2 + 216607^2 .

It is a cyclic number.

It is not a de Polignac number, because 161617316033 - 2⁸ = 161617315777 is a prime.

It is a super-2 number, since 2×161617316033² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161617316093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80808658016 + 80808658017.

It is an arithmetic number, because the mean of its divisors is an integer number (80808658017).

Almost surely, 2^161617316033 is an apocalyptic number.

It is an amenable number.

161617316033 is a deficient number, since it is larger than the sum of its proper divisors (1).

161617316033 is an equidigital number, since it uses as much as digits as its factorization.

161617316033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The spelling of 161617316033 in words is "one hundred sixty-one billion, six hundred seventeen million, three hundred sixteen thousand, thirty-three".