16644188416550 has 24 divisors (see below), whose sum is σ = 30964655337600. Its totient is φ = 6656285069280.

The previous prime is 16644188416547. The next prime is 16644188416601. The reversal of 16644188416550 is 5561488144661.

It is a self number, because there is not a number n which added to its sum of digits gives 16644188416550.

It is a congruent number.

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, 34515590 + ... + 34994489.

It is an arithmetic number, because the mean of its divisors is an integer number (1290193972400).

Almost surely, 2^{16644188416550} is an apocalyptic number.

16644188416550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16644188416550 is a deficient number, since it is larger than the sum of its proper divisors (14320466921050).

16644188416550 is a wasteful number, since it uses less digits than its factorization.

16644188416550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69514880 (or 69514875 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 59.

The spelling of 16644188416550 in words is "sixteen trillion, six hundred forty-four billion, one hundred eighty-eight million, four hundred sixteen thousand, five hundred fifty".