161233568 has 24 divisors (see below), whose sum is σ = 326010132. Its totient is φ = 78437376.

The previous prime is 161233561. The next prime is 161233571. The reversal of 161233568 is 865332161.

It can be written as a sum of positive squares in 2 ways, for example, as 108409744 + 52823824 = 10412^2 + 7268^2 .

It is not an unprimeable number, because it can be changed into a prime (161233561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66905 + ... + 69272.

Almost surely, 2^161233568 is an apocalyptic number.

It is an amenable number.

161233568 is an abundant number, since it is smaller than the sum of its proper divisors (164776564).

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

161233568 is a wasteful number, since it uses less digits than its factorization.

161233568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136224 (or 136216 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 161233568 is about 12697.7780733481. The cubic root of 161233568 is about 544.2751275553.

It can be divided in two parts, 16123 and 3568, that added together give a palindrome (19691).

The spelling of 161233568 in words is "one hundred sixty-one million, two hundred thirty-three thousand, five hundred sixty-eight".