161195973241 has 8 divisors (see below), whose sum is σ = 173016146664. Its totient is φ = 149635584000.

The previous prime is 161195973121. The next prime is 161195973269. The reversal of 161195973241 is 142379591161.

It can be written as a sum of positive squares in 4 ways, for example, as 27152118841 + 134043854400 = 164779^2 + 366120^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161195973241 - 2²³ = 161187584633 is a prime.

It is a super-2 number, since 2×161195973241² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161195923241) 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 in 7 ways as a sum of consecutive naturals, for example, 64944760 + ... + 64947241.

It is an arithmetic number, because the mean of its divisors is an integer number (21627018333).

Almost surely, 2^161195973241 is an apocalyptic number.

It is an amenable number.

161195973241 is a deficient number, since it is larger than the sum of its proper divisors (11820173423).

161195973241 is a wasteful number, since it uses less digits than its factorization.

161195973241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129892091.

The product of its digits is 408240, while the sum is 49.

The spelling of 161195973241 in words is "one hundred sixty-one billion, one hundred ninety-five million, nine hundred seventy-three thousand, two hundred forty-one".