161803650824 has 32 divisors (see below), whose sum is σ = 305335359000. Its totient is φ = 80382543360.

The previous prime is 161803650769. The next prime is 161803650829. The reversal of 161803650824 is 428056308161.

161803650824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 156190944100 + 5612706724 = 395210^2 + 74918^2 .

It is not an unprimeable number, because it can be changed into a prime (161803650829) 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 7 ways as a sum of consecutive naturals, for example, 681434 + ... + 887670.

Almost surely, 2^161803650824 is an apocalyptic number.

It is an amenable number.

161803650824 is a deficient number, since it is larger than the sum of its proper divisors (143531708176).

161803650824 is a wasteful number, since it uses less digits than its factorization.

161803650824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206873 (or 206869 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

Adding to 161803650824 its reverse (428056308161), we get a palindrome (589859958985).

The spelling of 161803650824 in words is "one hundred sixty-one billion, eight hundred three million, six hundred fifty thousand, eight hundred twenty-four".