16644166111573 has 128 divisors (see below), whose sum is σ = 22868654054400. Its totient is φ = 11696188907520.

The previous prime is 16644166111523. The next prime is 16644166111597. The reversal of 16644166111573 is 37511166144661.

It is not a de Polignac number, because 16644166111573 - 2²⁹ = 16643629240661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16644166111573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644166111523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4003886811 + ... + 4003890967.

It is an arithmetic number, because the mean of its divisors is an integer number (178661359800).

Almost surely, 2^{16644166111573} is an apocalyptic number.

16644166111573 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16644166111573 is a deficient number, since it is larger than the sum of its proper divisors (6224487942827).

16644166111573 is a wasteful number, since it uses less digits than its factorization.

16644166111573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4767.

The product of its digits is 2177280, while the sum is 52.

The spelling of 16644166111573 in words is "sixteen trillion, six hundred forty-four billion, one hundred sixty-six million, one hundred eleven thousand, five hundred seventy-three".