165634345 has 16 divisors (see below), whose sum is σ = 203493888. Its totient is φ = 129366720.

The previous prime is 165634331. The next prime is 165634351. The reversal of 165634345 is 543436561.

It is not a de Polignac number, because 165634345 - 2¹¹ = 165632297 is a prime.

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

It is a Duffinian number.

Its product of digits (129600) is a multiple of the sum of its prime divisors (1800).

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, 147727 + ... + 148843.

It is an arithmetic number, because the mean of its divisors is an integer number (12718368).

Almost surely, 2^165634345 is an apocalyptic number.

It is an amenable number.

165634345 is a deficient number, since it is larger than the sum of its proper divisors (37859543).

165634345 is a wasteful number, since it uses less digits than its factorization.

165634345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its digits is 129600, while the sum is 37.

The square root of 165634345 is about 12869.9007377679. The cubic root of 165634345 is about 549.1826371468.

The spelling of 165634345 in words is "one hundred sixty-five million, six hundred thirty-four thousand, three hundred forty-five".