165538461 has 8 divisors (see below), whose sum is σ = 240783264. Its totient is φ = 100326320.

The previous prime is 165538459. The next prime is 165538511. The reversal of 165538461 is 164835561.

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 165538461 - 2¹ = 165538459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165538661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508126 + ... + 2508191.

It is an arithmetic number, because the mean of its divisors is an integer number (30097908).

Almost surely, 2^165538461 is an apocalyptic number.

165538461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165538461 is a deficient number, since it is larger than the sum of its proper divisors (75244803).

165538461 is a wasteful number, since it uses less digits than its factorization.

165538461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016331.

The product of its digits is 86400, while the sum is 39.

The square root of 165538461 is about 12866.1750726469. The cubic root of 165538461 is about 549.0766446522.

The spelling of 165538461 in words is "one hundred sixty-five million, five hundred thirty-eight thousand, four hundred sixty-one".