161539996 has 6 divisors (see below), whose sum is σ = 282695000. Its totient is φ = 80769996.

The previous prime is 161539991. The next prime is 161539997. The reversal of 161539996 is 699935161.

161539996 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 (161539991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20192496 + ... + 20192503.

Almost surely, 2^161539996 is an apocalyptic number.

It is an amenable number.

161539996 is a deficient number, since it is larger than the sum of its proper divisors (121155004).

161539996 is a wasteful number, since it uses less digits than its factorization.

161539996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40385003 (or 40385001 counting only the distinct ones).

The product of its digits is 393660, while the sum is 49.

The square root of 161539996 is about 12709.8385512956. The cubic root of 161539996 is about 544.6197116995.

The spelling of 161539996 in words is "one hundred sixty-one million, five hundred thirty-nine thousand, nine hundred ninety-six".