161715841 has 8 divisors (see below), whose sum is σ = 186546240. Its totient is φ = 137317488.

The previous prime is 161715839. The next prime is 161715857. The reversal of 161715841 is 148517161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161715841 - 2¹ = 161715839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161715797 and 161715806.

It is not an unprimeable number, because it can be changed into a prime (161715811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107206 + ... + 108703.

It is an arithmetic number, because the mean of its divisors is an integer number (23318280).

Almost surely, 2^161715841 is an apocalyptic number.

It is an amenable number.

161715841 is a deficient number, since it is larger than the sum of its proper divisors (24830399).

161715841 is a wasteful number, since it uses less digits than its factorization.

161715841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216023.

The product of its digits is 6720, while the sum is 34.

The square root of 161715841 is about 12716.7543422054. The cubic root of 161715841 is about 544.8172560163.

The spelling of 161715841 in words is "one hundred sixty-one million, seven hundred fifteen thousand, eight hundred forty-one".