165490478 has 16 divisors (see below), whose sum is σ = 268432704. Its totient is φ = 76220160.

The previous prime is 165490471. The next prime is 165490483. The reversal of 165490478 is 874094561.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165490471) 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 7 ways as a sum of consecutive naturals, for example, 50183 + ... + 53378.

It is an arithmetic number, because the mean of its divisors is an integer number (16777044).

Almost surely, 2^165490478 is an apocalyptic number.

165490478 is a deficient number, since it is larger than the sum of its proper divisors (102942226).

165490478 is a wasteful number, since it uses less digits than its factorization.

165490478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103627.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 165490478 is about 12864.3102419057. The cubic root of 165490478 is about 549.0235877161.

The spelling of 165490478 in words is "one hundred sixty-five million, four hundred ninety thousand, four hundred seventy-eight".