6444164233403 has 8 divisors (see below), whose sum is σ = 7027715620800. Its totient is φ = 5873162338368.

The previous prime is 6444164233391. The next prime is 6444164233447. The reversal of 6444164233403 is 3043324614446.

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

It is not a de Polignac number, because 6444164233403 - 2¹⁶ = 6444164167867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444164233483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3137372018 + ... + 3137374071.

It is an arithmetic number, because the mean of its divisors is an integer number (878464452600).

Almost surely, 2^{6444164233403} is an apocalyptic number.

6444164233403 is a deficient number, since it is larger than the sum of its proper divisors (583551387397).

6444164233403 is a wasteful number, since it uses less digits than its factorization.

6444164233403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6274746181.

The product of its (nonzero) digits is 1990656, while the sum is 44.

Adding to 6444164233403 its reverse (3043324614446), we get a palindrome (9487488847849).

The spelling of 6444164233403 in words is "six trillion, four hundred forty-four billion, one hundred sixty-four million, two hundred thirty-three thousand, four hundred three".