161580930065 has 4 divisors (see below), whose sum is σ = 193897116084. Its totient is φ = 129264744048.

The previous prime is 161580930059. The next prime is 161580930097. The reversal of 161580930065 is 560039085161.

161580930065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124541233216 + 37039696849 = 352904^2 + 192457^2 .

It is a cyclic number.

It is not a de Polignac number, because 161580930065 - 2⁶ = 161580930001 is a prime.

It is a super-2 number, since 2×161580930065² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161580929998 and 161580930025.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16158093002 + ... + 16158093011.

It is an arithmetic number, because the mean of its divisors is an integer number (48474279021).

Almost surely, 2^161580930065 is an apocalyptic number.

It is an amenable number.

161580930065 is a deficient number, since it is larger than the sum of its proper divisors (32316186019).

161580930065 is an equidigital number, since it uses as much as digits as its factorization.

161580930065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32316186018.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 161580930065 in words is "one hundred sixty-one billion, five hundred eighty million, nine hundred thirty thousand, sixty-five".