161320145113 has 4 divisors (see below), whose sum is σ = 161508384180. Its totient is φ = 161131906048.

The previous prime is 161320145099. The next prime is 161320145141. The reversal of 161320145113 is 311541023161.

161320145113 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, and also an emirpimes, since its reverse is a distinct semiprime: 311541023161 = 37 ⋅8420027653.

It can be written as a sum of positive squares in 2 ways, for example, as 58848452569 + 102471692544 = 242587^2 + 320112^2 .

It is a cyclic number.

It is not a de Polignac number, because 161320145113 - 2⁵ = 161320145081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161320145143) by changing a digit.

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, 94118248 + ... + 94119961.

It is an arithmetic number, because the mean of its divisors is an integer number (40377096045).

Almost surely, 2^161320145113 is an apocalyptic number.

It is an amenable number.

161320145113 is a deficient number, since it is larger than the sum of its proper divisors (188239067).

161320145113 is an equidigital number, since it uses as much as digits as its factorization.

161320145113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188239066.

The product of its (nonzero) digits is 2160, while the sum is 28.

Adding to 161320145113 its reverse (311541023161), we get a palindrome (472861168274).

The spelling of 161320145113 in words is "one hundred sixty-one billion, three hundred twenty million, one hundred forty-five thousand, one hundred thirteen".