1644103512213 has 8 divisors (see below), whose sum is σ = 2192183791776. Its totient is φ = 1096046120400.

The previous prime is 1644103512203. The next prime is 1644103512251. The reversal of 1644103512213 is 3122153014461.

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

It is not a de Polignac number, because 1644103512213 - 2¹⁶ = 1644103446677 is a prime.

It is a super-3 number, since 3×1644103512213³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644103512203) 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, 5553618 + ... + 5842163.

It is an arithmetic number, because the mean of its divisors is an integer number (274022973972).

Almost surely, 2^{1644103512213} is an apocalyptic number.

It is an amenable number.

1644103512213 is a deficient number, since it is larger than the sum of its proper divisors (548080279563).

1644103512213 is a wasteful number, since it uses less digits than its factorization.

1644103512213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11443875.

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 1644103512213 its reverse (3122153014461), we get a palindrome (4766256526674).

The spelling of 1644103512213 in words is "one trillion, six hundred forty-four billion, one hundred three million, five hundred twelve thousand, two hundred thirteen".