16445648711 has 4 divisors (see below), whose sum is σ = 16449270072. Its totient is φ = 16442027352.

The previous prime is 16445648689. The next prime is 16445648767. The reversal of 16445648711 is 11784654461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16445648711 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 (16445648771) 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, 1803860 + ... + 1812953.

It is an arithmetic number, because the mean of its divisors is an integer number (4112317518).

Almost surely, 2^16445648711 is an apocalyptic number.

16445648711 is a deficient number, since it is larger than the sum of its proper divisors (3621361).

16445648711 is an equidigital number, since it uses as much as digits as its factorization.

16445648711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621360.

The product of its digits is 645120, while the sum is 47.

The spelling of 16445648711 in words is "sixteen billion, four hundred forty-five million, six hundred forty-eight thousand, seven hundred eleven".