161058545041 has 3 divisors (see below), whose sum is σ = 161058946363. Its totient is φ = 161058143720.

The previous prime is 161058545033. The next prime is 161058545083. The reversal of 161058545041 is 140545850161.

The square root of 161058545041 is 401321.

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., 9737545041 + 151321000000 = 98679^2 + 389000^2 .

It is not a de Polignac number, because 161058545041 - 2³ = 161058545033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161058544985 and 161058545003.

It is not an unprimeable number, because it can be changed into a prime (161058515041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 200661 + ... + 601981.

Almost surely, 2^161058545041 is an apocalyptic number.

161058545041 is the 401321-st square number.

161058545041 is the 200661-st centered octagonal number.

It is an amenable number.

161058545041 is a deficient number, since it is larger than the sum of its proper divisors (401322).

161058545041 is an frugal number, since it uses more digits than its factorization.

161058545041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802642 (or 401321 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 161058545041 in words is "one hundred sixty-one billion, fifty-eight million, five hundred forty-five thousand, forty-one".