161033656 has 128 divisors (see below), whose sum is σ = 385689600. Its totient is φ = 61470720.

The previous prime is 161033647. The next prime is 161033669. The reversal of 161033656 is 656330161.

161033656 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 31 ways as a sum of consecutive naturals, for example, 2639866 + ... + 2639926.

It is an arithmetic number, because the mean of its divisors is an integer number (3013200).

Almost surely, 2^161033656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161033656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192844800).

161033656 is an abundant number, since it is smaller than the sum of its proper divisors (224655944).

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

161033656 is a wasteful number, since it uses less digits than its factorization.

161033656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 193 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 161033656 is about 12689.9037033383. The cubic root of 161033656 is about 544.0500873000.

The spelling of 161033656 in words is "one hundred sixty-one million, thirty-three thousand, six hundred fifty-six".