16444173853013 has 4 divisors (see below), whose sum is σ = 16463451900588. Its totient is φ = 16424895805440.

The previous prime is 16444173852991. The next prime is 16444173853067. The reversal of 16444173853013 is 31035837144461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1410199000324 + 15033974852689 = 1187518^2 + 3877367^2 .

It is a cyclic number.

It is not a de Polignac number, because 16444173853013 - 2¹² = 16444173848917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16444173853073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9639022508 + ... + 9639024213.

It is an arithmetic number, because the mean of its divisors is an integer number (4115862975147).

Almost surely, 2^{16444173853013} is an apocalyptic number.

It is an amenable number.

16444173853013 is a deficient number, since it is larger than the sum of its proper divisors (19278047575).

16444173853013 is an equidigital number, since it uses as much as digits as its factorization.

16444173853013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19278047574.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 16444173853013 in words is "sixteen trillion, four hundred forty-four billion, one hundred seventy-three million, eight hundred fifty-three thousand, thirteen".