161216256 has 36 divisors (see below), whose sum is σ = 429072392. Its totient is φ = 53738496.

The previous prime is 161216243. The next prime is 161216303. The reversal of 161216256 is 652612161.

161216256 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104191 + ... + 105726.

Almost surely, 2^161216256 is an apocalyptic number.

161216256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161216256 is an abundant number, since it is smaller than the sum of its proper divisors (267856136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161216256 is an equidigital number, since it uses as much as digits as its factorization.

161216256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209936 (or 209922 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 161216256 is about 12697.0963609795. The cubic root of 161216256 is about 544.2556468554.

The spelling of 161216256 in words is "one hundred sixty-one million, two hundred sixteen thousand, two hundred fifty-six".