161803432916 has 12 divisors (see below), whose sum is σ = 286075142388. Its totient is φ = 80067677952.

The previous prime is 161803432883. The next prime is 161803432939. The reversal of 161803432916 is 619234308161.

161803432916 is digitally balanced in base 3, 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 2 ways, for example, as 42263136400 + 119540296516 = 205580^2 + 345746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208509191 + ... + 208509966.

It is an arithmetic number, because the mean of its divisors is an integer number (23839595199).

Almost surely, 2^161803432916 is an apocalyptic number.

It is an amenable number.

161803432916 is a deficient number, since it is larger than the sum of its proper divisors (124271709472).

161803432916 is a wasteful number, since it uses less digits than its factorization.

161803432916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417019258 (or 417019256 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 44.

The spelling of 161803432916 in words is "one hundred sixty-one billion, eight hundred three million, four hundred thirty-two thousand, nine hundred sixteen".