165411563 has 8 divisors (see below), whose sum is σ = 171536400. Its totient is φ = 159314848.

The previous prime is 165411557. The next prime is 165411577. The reversal of 165411563 is 365114561.

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-165411563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165411523) 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, 5345 + ... + 18957.

It is an arithmetic number, because the mean of its divisors is an integer number (21442050).

Almost surely, 2^165411563 is an apocalyptic number.

165411563 is a deficient number, since it is larger than the sum of its proper divisors (6124837).

165411563 is a wasteful number, since it uses less digits than its factorization.

165411563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14061.

The product of its digits is 10800, while the sum is 32.

The square root of 165411563 is about 12861.2426693535. The cubic root of 165411563 is about 548.9363055845.

The spelling of 165411563 in words is "one hundred sixty-five million, four hundred eleven thousand, five hundred sixty-three".