16041643 has 4 divisors (see below), whose sum is σ = 16885960. Its totient is φ = 15197328.

The previous prime is 16041637. The next prime is 16041647. The reversal of 16041643 is 34614061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34614061 = 59 ⋅586679.

It is a cyclic number.

It is not a de Polignac number, because 16041643 - 2⁹ = 16041131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16041647) 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, 422130 + ... + 422167.

It is an arithmetic number, because the mean of its divisors is an integer number (4221490).

Almost surely, 2^16041643 is an apocalyptic number.

16041643 is a deficient number, since it is larger than the sum of its proper divisors (844317).

16041643 is an equidigital number, since it uses as much as digits as its factorization.

16041643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844316.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 16041643 is about 4005.2019924094. The cubic root of 16041643 is about 252.2026326443.

The spelling of 16041643 in words is "sixteen million, forty-one thousand, six hundred forty-three".