16444221161600 has 96 divisors (see below), whose sum is σ = 40633845733200. Its totient is φ = 6575829488640.

The previous prime is 16444221161591. The next prime is 16444221161623. The reversal of 16444221161600 is 616112244461.

It is a super-2 number, since 2×16444221161600² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10626011 + ... + 12074789.

Almost surely, 2^{16444221161600} is an apocalyptic number.

16444221161600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16444221161600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20316922866600).

16444221161600 is an abundant number, since it is smaller than the sum of its proper divisors (24189624571600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16444221161600 is a wasteful number, since it uses less digits than its factorization.

16444221161600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452350 (or 1452333 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 16444221161600 in words is "sixteen trillion, four hundred forty-four billion, two hundred twenty-one million, one hundred sixty-one thousand, six hundred".