161476565617 has 2 divisors, whose sum is σ = 161476565618. Its totient is φ = 161476565616.

The previous prime is 161476565597. The next prime is 161476565671. The reversal of 161476565617 is 716565674161.

Together with next prime (161476565671) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122525201296 + 38951364321 = 350036^2 + 197361^2 .

It is a cyclic number.

It is not a de Polignac number, because 161476565617 - 2¹¹ = 161476563569 is a prime.

It is a super-2 number, since 2×161476565617² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161476535617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80738282808 + 80738282809.

It is an arithmetic number, because the mean of its divisors is an integer number (80738282809).

Almost surely, 2^161476565617 is an apocalyptic number.

It is an amenable number.

161476565617 is a deficient number, since it is larger than the sum of its proper divisors (1).

161476565617 is an equidigital number, since it uses as much as digits as its factorization.

161476565617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6350400, while the sum is 55.

The spelling of 161476565617 in words is "one hundred sixty-one billion, four hundred seventy-six million, five hundred sixty-five thousand, six hundred seventeen".