161536 has 18 divisors (see below), whose sum is σ = 322952. Its totient is φ = 80640.

The previous prime is 161531. The next prime is 161543. The reversal of 161536 is 635161.

161536 is nontrivially palindromic in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161531) by changing a digit.

161536 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60 + ... + 571.

2¹⁶¹⁵³⁶ is an apocalyptic number.

161536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161536 is a deficient number, since it is larger than the sum of its proper divisors (161416).

161536 is an frugal number, since it uses more digits than its factorization.

161536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 633 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 161536 is about 401.9154139866. The cubic root of 161536 is about 54.4615220927.

Adding to 161536 its reverse (635161), we get a palindrome (796697).

The spelling of 161536 in words is "one hundred sixty-one thousand, five hundred thirty-six".