165564245 has 32 divisors (see below), whose sum is σ = 248507136. Its totient is φ = 102873600.

The previous prime is 165564197. The next prime is 165564251. The reversal of 165564245 is 542465561.

It is not a de Polignac number, because 165564245 - 2²⁰ = 164515669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 165564199 and 165564208.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 175475 + ... + 176415.

It is an arithmetic number, because the mean of its divisors is an integer number (7765848).

Almost surely, 2^165564245 is an apocalyptic number.

It is an amenable number.

165564245 is a deficient number, since it is larger than the sum of its proper divisors (82942891).

165564245 is a wasteful number, since it uses less digits than its factorization.

165564245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421.

The product of its digits is 144000, while the sum is 38.

The square root of 165564245 is about 12867.1770408276. The cubic root of 165564245 is about 549.1051509323.

The spelling of 165564245 in words is "one hundred sixty-five million, five hundred sixty-four thousand, two hundred forty-five".