165538465 has 8 divisors (see below), whose sum is σ = 202872960. Its totient is φ = 129612912.

The previous prime is 165538459. The next prime is 165538511. The reversal of 165538465 is 564835561.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165538465 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351975 + ... + 352444.

It is an arithmetic number, because the mean of its divisors is an integer number (25359120).

Almost surely, 2^165538465 is an apocalyptic number.

It is an amenable number.

165538465 is a deficient number, since it is larger than the sum of its proper divisors (37334495).

165538465 is an equidigital number, since it uses as much as digits as its factorization.

165538465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704471.

The product of its digits is 432000, while the sum is 43.

The square root of 165538465 is about 12866.1752280932. The cubic root of 165538465 is about 549.0766490747.

The spelling of 165538465 in words is "one hundred sixty-five million, five hundred thirty-eight thousand, four hundred sixty-five".