165579449 has 16 divisors (see below), whose sum is σ = 193855488. Its totient is φ = 138478032.

The previous prime is 165579431. The next prime is 165579451. The reversal of 165579449 is 944975561.

It is a de Polignac number, because none of the positive numbers 2^k-165579449 is a prime.

It is a super-2 number, since 2×165579449² = 54833107862287202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165579397 and 165579406.

It is not an unprimeable number, because it can be changed into a prime (165579499) 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, 151784 + ... + 152870.

It is an arithmetic number, because the mean of its divisors is an integer number (12115968).

Almost surely, 2^165579449 is an apocalyptic number.

It is an amenable number.

165579449 is a deficient number, since it is larger than the sum of its proper divisors (28276039).

165579449 is a wasteful number, since it uses less digits than its factorization.

165579449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1604.

The product of its digits is 1360800, while the sum is 50.

The square root of 165579449 is about 12867.7678328450. The cubic root of 165579449 is about 549.1219587867.

The spelling of 165579449 in words is "one hundred sixty-five million, five hundred seventy-nine thousand, four hundred forty-nine".