165478941 has 6 divisors (see below), whose sum is σ = 239025150. Its totient is φ = 110319288.

The previous prime is 165478939. The next prime is 165478949. The reversal of 165478941 is 149874561.

165478941 is a `hidden beast` number, since 16 + 547 + 8 + 94 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90725625 + 74753316 = 9525^2 + 8646^2 .

It is not a de Polignac number, because 165478941 - 2¹ = 165478939 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165478949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9193266 + ... + 9193283.

It is an arithmetic number, because the mean of its divisors is an integer number (39837525).

Almost surely, 2^165478941 is an apocalyptic number.

It is an amenable number.

165478941 is a deficient number, since it is larger than the sum of its proper divisors (73546209).

165478941 is a wasteful number, since it uses less digits than its factorization.

165478941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18386555 (or 18386552 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 165478941 is about 12863.8618229519. The cubic root of 165478941 is about 549.0108292130.

The spelling of 165478941 in words is "one hundred sixty-five million, four hundred seventy-eight thousand, nine hundred forty-one".