161366568 has 96 divisors (see below), whose sum is σ = 447326880. Its totient is φ = 48470400.

The previous prime is 161366561. The next prime is 161366633. The reversal of 161366568 is 865663161.

It is not an unprimeable number, because it can be changed into a prime (161366561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 525471 + ... + 525777.

It is an arithmetic number, because the mean of its divisors is an integer number (4659655).

Almost surely, 2^161366568 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 161366568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223663440).

161366568 is an abundant number, since it is smaller than the sum of its proper divisors (285960312).

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

161366568 is a wasteful number, since it uses less digits than its factorization.

161366568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519 (or 504 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 161366568 is about 12703.0141305125. The cubic root of 161366568 is about 544.4247421750.

The spelling of 161366568 in words is "one hundred sixty-one million, three hundred sixty-six thousand, five hundred sixty-eight".