165026563 has 8 divisors (see below), whose sum is σ = 178028928. Its totient is φ = 152068224.

The previous prime is 165026551. The next prime is 165026567. The reversal of 165026563 is 365620561.

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 165026563 - 2¹⁷ = 164895491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165026567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995 + ... + 18412.

It is an arithmetic number, because the mean of its divisors is an integer number (22253616).

Almost surely, 2^165026563 is an apocalyptic number.

165026563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165026563 is a deficient number, since it is larger than the sum of its proper divisors (13002365).

165026563 is a wasteful number, since it uses less digits than its factorization.

165026563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22013.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 165026563 is about 12846.2665004273. The cubic root of 165026563 is about 548.5100865764.

The spelling of 165026563 in words is "one hundred sixty-five million, twenty-six thousand, five hundred sixty-three".