16444773985 has 8 divisors (see below), whose sum is σ = 20011669056. Its totient is φ = 12970525680.

The previous prime is 16444773977. The next prime is 16444774007. The reversal of 16444773985 is 58937744461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16444773985 - 2³ = 16444773977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23161299 + ... + 23162008.

It is an arithmetic number, because the mean of its divisors is an integer number (2501458632).

Almost surely, 2^16444773985 is an apocalyptic number.

It is an amenable number.

16444773985 is a deficient number, since it is larger than the sum of its proper divisors (3566895071).

16444773985 is an equidigital number, since it uses as much as digits as its factorization.

16444773985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46323383.

The product of its digits is 20321280, while the sum is 58.

The spelling of 16444773985 in words is "sixteen billion, four hundred forty-four million, seven hundred seventy-three thousand, nine hundred eighty-five".