16644055126 has 4 divisors (see below), whose sum is σ = 24966082692. Its totient is φ = 8322027562.

The previous prime is 16644055121. The next prime is 16644055163. The reversal of 16644055126 is 62155044661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62155044661 = 229 ⋅271419409.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644055121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4161013780 + ... + 4161013783.

It is an arithmetic number, because the mean of its divisors is an integer number (6241520673).

Almost surely, 2^16644055126 is an apocalyptic number.

16644055126 is a deficient number, since it is larger than the sum of its proper divisors (8322027566).

16644055126 is an equidigital number, since it uses as much as digits as its factorization.

16644055126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8322027565.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 16644055126 its reverse (62155044661), we get a palindrome (78799099787).

The spelling of 16644055126 in words is "sixteen billion, six hundred forty-four million, fifty-five thousand, one hundred twenty-six".