163840915 has 8 divisors (see below), whose sum is σ = 224696160. Its totient is φ = 112348032.

The previous prime is 163840913. The next prime is 163840927. The reversal of 163840915 is 519048361.

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 163840915 - 2¹ = 163840913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163840913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2340550 + ... + 2340619.

It is an arithmetic number, because the mean of its divisors is an integer number (28087020).

Almost surely, 2^163840915 is an apocalyptic number.

163840915 is a deficient number, since it is larger than the sum of its proper divisors (60855245).

163840915 is an equidigital number, since it uses as much as digits as its factorization.

163840915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681181.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 163840915 is about 12800.0357421376. The cubic root of 163840915 is about 547.1933215727.

The spelling of 163840915 in words is "one hundred sixty-three million, eight hundred forty thousand, nine hundred fifteen".