165144040 has 16 divisors (see below), whose sum is σ = 371574180. Its totient is φ = 66057600.

The previous prime is 165144017. The next prime is 165144043. The reversal of 165144040 is 40441561.

165144040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 158206084 + 6937956 = 12578^2 + 2634^2 .

It is a junction number, because it is equal to n+sod(n) for n = 165143996 and 165144014.

It is not an unprimeable number, because it can be changed into a prime (165144043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064261 + ... + 2064340.

Almost surely, 2^165144040 is an apocalyptic number.

165144040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165144040 is an abundant number, since it is smaller than the sum of its proper divisors (206430140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165144040 is a wasteful number, since it uses less digits than its factorization.

165144040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128612 (or 4128608 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 165144040 is about 12850.8381049642. The cubic root of 165144040 is about 548.6402111536.

The spelling of 165144040 in words is "one hundred sixty-five million, one hundred forty-four thousand, forty".