161490998485 has 4 divisors (see below), whose sum is σ = 193789198188. Its totient is φ = 129192798784.

The previous prime is 161490998377. The next prime is 161490998527. The reversal of 161490998485 is 584899094161.

161490998485 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: 584899094161 = 569 ⋅1027942169.

It can be written as a sum of positive squares in 2 ways, for example, as 50110613316 + 111380385169 = 223854^2 + 333737^2 .

It is a cyclic number.

It is not a de Polignac number, because 161490998485 - 2¹¹ = 161490996437 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 16149099844 + ... + 16149099853.

It is an arithmetic number, because the mean of its divisors is an integer number (48447299547).

Almost surely, 2^161490998485 is an apocalyptic number.

It is an amenable number.

161490998485 is a deficient number, since it is larger than the sum of its proper divisors (32298199703).

161490998485 is an equidigital number, since it uses as much as digits as its factorization.

161490998485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32298199702.

The product of its (nonzero) digits is 22394880, while the sum is 64.

The spelling of 161490998485 in words is "one hundred sixty-one billion, four hundred ninety million, nine hundred ninety-eight thousand, four hundred eighty-five".