161893936 has 20 divisors (see below), whose sum is σ = 314522032. Its totient is φ = 80726976.

The previous prime is 161893933. The next prime is 161893957. The reversal of 161893936 is 639398161.

161893936 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161893931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7596 + ... + 19531.

Almost surely, 2^161893936 is an apocalyptic number.

161893936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161893936 is a deficient number, since it is larger than the sum of its proper divisors (152628096).

161893936 is a wasteful number, since it uses less digits than its factorization.

161893936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27508 (or 27502 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The square root of 161893936 is about 12723.7547917272. The cubic root of 161893936 is about 545.0171820748.

The spelling of 161893936 in words is "one hundred sixty-one million, eight hundred ninety-three thousand, nine hundred thirty-six".