16144591 has 4 divisors (see below), whose sum is σ = 16170192. Its totient is φ = 16118992.

The previous prime is 16144567. The next prime is 16144603. The reversal of 16144591 is 19544161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16144591 - 2⁷ = 16144463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16144501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11830 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (4042548).

Almost surely, 2^16144591 is an apocalyptic number.

16144591 is a deficient number, since it is larger than the sum of its proper divisors (25601).

16144591 is an equidigital number, since it uses as much as digits as its factorization.

16144591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25600.

The product of its digits is 4320, while the sum is 31.

The square root of 16144591 is about 4018.0332253479. The cubic root of 16144591 is about 252.7409900638.

The spelling of 16144591 in words is "sixteen million, one hundred forty-four thousand, five hundred ninety-one".