165163894 has 16 divisors (see below), whose sum is σ = 284145408. Its totient is φ = 70532712.

The previous prime is 165163879. The next prime is 165163909. The reversal of 165163894 is 498361561.

It is an interprime number because it is at equal distance from previous prime (165163879) and next prime (165163909).

It is a super-2 number, since 2×165163894² = 54558223762486472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165163894.

It is a congruent number.

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, 16882 + ... + 24805.

It is an arithmetic number, because the mean of its divisors is an integer number (17759088).

Almost surely, 2^165163894 is an apocalyptic number.

165163894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

165163894 is a deficient number, since it is larger than the sum of its proper divisors (118981514).

165163894 is a wasteful number, since it uses less digits than its factorization.

165163894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41979.

The product of its digits is 155520, while the sum is 43.

The square root of 165163894 is about 12851.6105605484. The cubic root of 165163894 is about 548.6621965393.

The spelling of 165163894 in words is "one hundred sixty-five million, one hundred sixty-three thousand, eight hundred ninety-four".