16010561 has 4 divisors (see below), whose sum is σ = 18297792. Its totient is φ = 13723332.

The previous prime is 16010551. The next prime is 16010563. The reversal of 16010561 is 16501061.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16501061 = 59 ⋅279679.

It is a de Polignac number, because none of the positive numbers 2^k-16010561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16010563) 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 3 ways as a sum of consecutive naturals, for example, 1143605 + ... + 1143618.

It is an arithmetic number, because the mean of its divisors is an integer number (4574448).

Almost surely, 2^16010561 is an apocalyptic number.

It is an amenable number.

16010561 is a deficient number, since it is larger than the sum of its proper divisors (2287231).

16010561 is an equidigital number, since it uses as much as digits as its factorization.

16010561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287230.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 16010561 is about 4001.3199072306. The cubic root of 16010561 is about 252.0396395610.

The spelling of 16010561 in words is "sixteen million, ten thousand, five hundred sixty-one".