16560191 has 4 divisors (see below), whose sum is σ = 17431800. Its totient is φ = 15688584.

The previous prime is 16560163. The next prime is 16560197. The reversal of 16560191 is 19106561.

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 16560191 - 2¹⁰ = 16559167 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 (16560197) 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, 435776 + ... + 435813.

It is an arithmetic number, because the mean of its divisors is an integer number (4357950).

Almost surely, 2^16560191 is an apocalyptic number.

16560191 is a deficient number, since it is larger than the sum of its proper divisors (871609).

16560191 is an equidigital number, since it uses as much as digits as its factorization.

16560191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871608.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 16560191 is about 4069.4214576522. The cubic root of 16560191 is about 254.8913595909.

The spelling of 16560191 in words is "sixteen million, five hundred sixty thousand, one hundred ninety-one".