161595845 has 4 divisors (see below), whose sum is σ = 193915020. Its totient is φ = 129276672.

The previous prime is 161595809. The next prime is 161595851. The reversal of 161595845 is 548595161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42393121 + 119202724 = 6511^2 + 10918^2 .

It is a cyclic number.

It is not a de Polignac number, because 161595845 - 2¹⁶ = 161530309 is a prime.

It is a super-2 number, since 2×161595845² = 52226434242528050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161595796 and 161595805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16159580 + ... + 16159589.

It is an arithmetic number, because the mean of its divisors is an integer number (48478755).

Almost surely, 2^161595845 is an apocalyptic number.

It is an amenable number.

161595845 is a deficient number, since it is larger than the sum of its proper divisors (32319175).

161595845 is an equidigital number, since it uses as much as digits as its factorization.

161595845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32319174.

The product of its digits is 216000, while the sum is 44.

The square root of 161595845 is about 12712.0354389059. The cubic root of 161595845 is about 544.6824680084.

The spelling of 161595845 in words is "one hundred sixty-one million, five hundred ninety-five thousand, eight hundred forty-five".