161536645 has 8 divisors (see below), whose sum is σ = 194296320. Its totient is φ = 128927760.

The previous prime is 161536643. The next prime is 161536667. The reversal of 161536645 is 546635161.

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

It is not a de Polignac number, because 161536645 - 2¹ = 161536643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161536643) 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, 35325 + ... + 39634.

It is an arithmetic number, because the mean of its divisors is an integer number (24287040).

Almost surely, 2^161536645 is an apocalyptic number.

It is an amenable number.

161536645 is a deficient number, since it is larger than the sum of its proper divisors (32759675).

161536645 is an equidigital number, since it uses as much as digits as its factorization.

161536645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75395.

The product of its digits is 64800, while the sum is 37.

The square root of 161536645 is about 12709.7067236030. The cubic root of 161536645 is about 544.6159457936.

The spelling of 161536645 in words is "one hundred sixty-one million, five hundred thirty-six thousand, six hundred forty-five".