16506444443 has 32 divisors (see below), whose sum is σ = 17449344000. Its totient is φ = 15600816000.

The previous prime is 16506444433. The next prime is 16506444463. The reversal of 16506444443 is 34444460561.

It is a cyclic number.

It is not a de Polignac number, because 16506444443 - 2⁶ = 16506444379 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16506444443.

It is not an unprimeable number, because it can be changed into a prime (16506444413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61362113 + ... + 61362381.

It is an arithmetic number, because the mean of its divisors is an integer number (545292000).

Almost surely, 2^16506444443 is an apocalyptic number.

16506444443 is a deficient number, since it is larger than the sum of its proper divisors (942899557).

16506444443 is a wasteful number, since it uses less digits than its factorization.

16506444443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683.

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 16506444443 in words is "sixteen billion, five hundred six million, four hundred forty-four thousand, four hundred forty-three".