165161144 has 16 divisors (see below), whose sum is σ = 315520920. Its totient is φ = 81022240.

The previous prime is 165161141. The next prime is 165161147. The reversal of 165161144 is 441161561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (165161141) and next prime (165161147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165161141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194342 + ... + 195189.

Almost surely, 2^165161144 is an apocalyptic number.

It is an amenable number.

165161144 is a deficient number, since it is larger than the sum of its proper divisors (150359776).

165161144 is a wasteful number, since it uses less digits than its factorization.

165161144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389590 (or 389586 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 165161144 is about 12851.5035696217. The cubic root of 165161144 is about 548.6591514238.

The spelling of 165161144 in words is "one hundred sixty-five million, one hundred sixty-one thousand, one hundred forty-four".