161744098573 has 2 divisors, whose sum is σ = 161744098574. Its totient is φ = 161744098572.

The previous prime is 161744098499. The next prime is 161744098589. The reversal of 161744098573 is 375890447161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107281141444 + 54462957129 = 327538^2 + 233373^2 .

It is a cyclic number.

It is not a de Polignac number, because 161744098573 - 2¹³ = 161744090381 is a prime.

It is a super-2 number, since 2×161744098573² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161744098973) 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, 80872049286 + 80872049287.

It is an arithmetic number, because the mean of its divisors is an integer number (80872049287).

Almost surely, 2^161744098573 is an apocalyptic number.

It is an amenable number.

161744098573 is a deficient number, since it is larger than the sum of its proper divisors (1).

161744098573 is an equidigital number, since it uses as much as digits as its factorization.

161744098573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 161744098573 in words is "one hundred sixty-one billion, seven hundred forty-four million, ninety-eight thousand, five hundred seventy-three".