165501161 has 8 divisors (see below), whose sum is σ = 189416640. Its totient is φ = 141653808.

The previous prime is 165501143. The next prime is 165501163. The reversal of 165501161 is 161105561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165501161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165501161.

It is not an unprimeable number, because it can be changed into a prime (165501163) 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, 11711 + ... + 21636.

It is an arithmetic number, because the mean of its divisors is an integer number (23677080).

Almost surely, 2^165501161 is an apocalyptic number.

It is an amenable number.

165501161 is a deficient number, since it is larger than the sum of its proper divisors (23915479).

165501161 is an equidigital number, since it uses as much as digits as its factorization.

165501161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34063.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 165501161 is about 12864.7254537359. The cubic root of 165501161 is about 549.0354012715.

The spelling of 165501161 in words is "one hundred sixty-five million, five hundred one thousand, one hundred sixty-one".