161636032 has 28 divisors (see below), whose sum is σ = 321448176. Its totient is φ = 80641280.

The previous prime is 161636023. The next prime is 161636039. The reversal of 161636032 is 230636161.

It is a super-2 number, since 2×161636032² = 52252413681410048, which contains 22 as substring.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (161636039) 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, 29682 + ... + 34702.

It is an arithmetic number, because the mean of its divisors is an integer number (11480292).

Almost surely, 2^161636032 is an apocalyptic number.

It is an amenable number.

161636032 is a deficient number, since it is larger than the sum of its proper divisors (159812144).

161636032 is an equidigital number, since it uses as much as digits as its factorization.

161636032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536 (or 5526 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 161636032 is about 12713.6160080443. The cubic root of 161636032 is about 544.7276163228.

The spelling of 161636032 in words is "one hundred sixty-one million, six hundred thirty-six thousand, thirty-two".