161074598281 has 3 divisors (see below), whose sum is σ = 161074999623. Its totient is φ = 161074196940.

The previous prime is 161074598257. The next prime is 161074598327. The reversal of 161074598281 is 182895470161.

The square root of 161074598281 is 401341.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 117552293881 + 43522304400 = 342859^2 + 208620^2 .

It is not a de Polignac number, because 161074598281 - 2⁵ = 161074598249 is a prime.

It is a super-2 number, since 2×161074598281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161074548281) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 200671 + ... + 602011.

It is an arithmetic number, because the mean of its divisors is an integer number (53691666541).

Almost surely, 2^161074598281 is an apocalyptic number.

161074598281 is the 401341-st square number.

161074598281 is the 200671-st centered octagonal number.

It is an amenable number.

161074598281 is a deficient number, since it is larger than the sum of its proper divisors (401342).

161074598281 is an frugal number, since it uses more digits than its factorization.

161074598281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802682 (or 401341 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 161074598281 in words is "one hundred sixty-one billion, seventy-four million, five hundred ninety-eight thousand, two hundred eighty-one".