161642316 has 48 divisors (see below), whose sum is σ = 412755840. Its totient is φ = 48827520.

The previous prime is 161642311. The next prime is 161642323. The reversal of 161642316 is 613246161.

161642316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161642316² = 52256476643687712, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (161642311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44040 + ... + 47568.

It is an arithmetic number, because the mean of its divisors is an integer number (8599080).

Almost surely, 2^161642316 is an apocalyptic number.

It is an amenable number.

161642316 is an abundant number, since it is smaller than the sum of its proper divisors (251113524).

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

161642316 is a wasteful number, since it uses less digits than its factorization.

161642316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894 (or 3892 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 161642316 is about 12713.8631422554. The cubic root of 161642316 is about 544.7346754419.

Adding to 161642316 its reverse (613246161), we get a palindrome (774888477).

The spelling of 161642316 in words is "one hundred sixty-one million, six hundred forty-two thousand, three hundred sixteen".