165634545 has 8 divisors (see below), whose sum is σ = 265015296. Its totient is φ = 88338416.

The previous prime is 165634531. The next prime is 165634561. The reversal of 165634545 is 545436561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165634545 - 2¹⁰ = 165633521 is a prime.

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

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 5521137 + ... + 5521166.

It is an arithmetic number, because the mean of its divisors is an integer number (33126912).

Almost surely, 2^165634545 is an apocalyptic number.

165634545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165634545 is a deficient number, since it is larger than the sum of its proper divisors (99380751).

165634545 is a wasteful number, since it uses less digits than its factorization.

165634545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11042311.

The product of its digits is 216000, while the sum is 39.

The square root of 165634545 is about 12869.9085078333. The cubic root of 165634545 is about 549.1828581889.

The spelling of 165634545 in words is "one hundred sixty-five million, six hundred thirty-four thousand, five hundred forty-five".