161708568 has 64 divisors (see below), whose sum is σ = 467631360. Its totient is φ = 45641856.

The previous prime is 161708567. The next prime is 161708581. The reversal of 161708568 is 865807161.

161708568 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161708568² = 52299321929221248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161708567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8146 + ... + 19742.

It is an arithmetic number, because the mean of its divisors is an integer number (7306740).

Almost surely, 2^161708568 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 161708568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233815680).

161708568 is an abundant number, since it is smaller than the sum of its proper divisors (305922792).

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

161708568 is a wasteful number, since it uses less digits than its factorization.

161708568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11696 (or 11692 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 161708568 is about 12716.4683776589. The cubic root of 161708568 is about 544.8090883660.

The spelling of 161708568 in words is "one hundred sixty-one million, seven hundred eight thousand, five hundred sixty-eight".