165824545 has 16 divisors (see below), whose sum is σ = 214675920. Its totient is φ = 122497024.

The previous prime is 165824521. The next prime is 165824591. The reversal of 165824545 is 545428561.

It can be written as a sum of positive squares in 8 ways, for example, as 2572816 + 163251729 = 1604^2 + 12777^2 .

It is a cyclic number.

It is not a de Polignac number, because 165824545 - 2⁹ = 165824033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165824498 and 165824507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13900 + ... + 22909.

It is an arithmetic number, because the mean of its divisors is an integer number (13417245).

Almost surely, 2^165824545 is an apocalyptic number.

It is an amenable number.

165824545 is a deficient number, since it is larger than the sum of its proper divisors (48851375).

165824545 is a wasteful number, since it uses less digits than its factorization.

165824545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36884.

The product of its digits is 192000, while the sum is 40.

The square root of 165824545 is about 12877.2879520495. The cubic root of 165824545 is about 549.3927678435.

The spelling of 165824545 in words is "one hundred sixty-five million, eight hundred twenty-four thousand, five hundred forty-five".