161856888 has 64 divisors (see below), whose sum is σ = 436838400. Its totient is φ = 49822080.

The previous prime is 161856887. The next prime is 161856899. The reversal of 161856888 is 888658161.

161856888 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161856888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161856887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10953 + ... + 21063.

It is an arithmetic number, because the mean of its divisors is an integer number (6825600).

Almost surely, 2^161856888 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 161856888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218419200).

161856888 is an abundant number, since it is smaller than the sum of its proper divisors (274981512).

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

161856888 is a wasteful number, since it uses less digits than its factorization.

161856888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10172 (or 10168 counting only the distinct ones).

The product of its digits is 737280, while the sum is 51.

The square root of 161856888 is about 12722.2988488716. The cubic root of 161856888 is about 544.9756047774.

The spelling of 161856888 in words is "one hundred sixty-one million, eight hundred fifty-six thousand, eight hundred eighty-eight".