16644236413 has 8 divisors (see below), whose sum is σ = 19305895232. Its totient is φ = 14053555296.

The previous prime is 16644236387. The next prime is 16644236429. The reversal of 16644236413 is 31463244661.

16644236413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16644236413 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 (16644236813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17743920 + ... + 17744857.

It is an arithmetic number, because the mean of its divisors is an integer number (2413236904).

Almost surely, 2^16644236413 is an apocalyptic number.

It is an amenable number.

16644236413 is a deficient number, since it is larger than the sum of its proper divisors (2661658819).

16644236413 is an equidigital number, since it uses as much as digits as its factorization.

16644236413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35488851.

The product of its digits is 248832, while the sum is 40.

The spelling of 16644236413 in words is "sixteen billion, six hundred forty-four million, two hundred thirty-six thousand, four hundred thirteen".