165011445 has 16 divisors (see below), whose sum is σ = 293353920. Its totient is φ = 88006032.

The previous prime is 165011443. The next prime is 165011449. The reversal of 165011445 is 544110561.

165011445 is a `hidden beast` number, since 1 + 650 + 1 + 1 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 165011445 - 2¹ = 165011443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165011443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611019 + ... + 611288.

It is an arithmetic number, because the mean of its divisors is an integer number (18334620).

Almost surely, 2^165011445 is an apocalyptic number.

165011445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165011445 is a deficient number, since it is larger than the sum of its proper divisors (128342475).

165011445 is a wasteful number, since it uses less digits than its factorization.

165011445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222321 (or 1222315 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 165011445 is about 12845.6780669609. The cubic root of 165011445 is about 548.4933364876.

The spelling of 165011445 in words is "one hundred sixty-five million, eleven thousand, four hundred forty-five".