161804564884 has 12 divisors (see below), whose sum is σ = 285387579904. Its totient is φ = 80265256344.

The previous prime is 161804564881. The next prime is 161804564921. The reversal of 161804564884 is 488465408161.

161804564884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161804564881) 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, 159255954 + ... + 159256969.

Almost surely, 2^161804564884 is an apocalyptic number.

It is an amenable number.

161804564884 is a deficient number, since it is larger than the sum of its proper divisors (123583015020).

161804564884 is a wasteful number, since it uses less digits than its factorization.

161804564884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318513054 (or 318513052 counting only the distinct ones).

The product of its (nonzero) digits is 5898240, while the sum is 55.

The spelling of 161804564884 in words is "one hundred sixty-one billion, eight hundred four million, five hundred sixty-four thousand, eight hundred eighty-four".