16945219844 has 48 divisors (see below), whose sum is σ = 36278860800. Its totient is φ = 6763391136.

The previous prime is 16945219817. The next prime is 16945219873. The reversal of 16945219844 is 44891254961.

It is a super-2 number, since 2×16945219844² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238544 + ... + 301319.

It is an arithmetic number, because the mean of its divisors is an integer number (755809600).

Almost surely, 2^16945219844 is an apocalyptic number.

16945219844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16945219844 is an abundant number, since it is smaller than the sum of its proper divisors (19333640956).

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

16945219844 is a wasteful number, since it uses less digits than its factorization.

16945219844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539952 (or 539950 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The spelling of 16945219844 in words is "sixteen billion, nine hundred forty-five million, two hundred nineteen thousand, eight hundred forty-four".