1644133034653 has 4 divisors (see below), whose sum is σ = 1655167484700. Its totient is φ = 1633098584608.

The previous prime is 1644133034651. The next prime is 1644133034683. The reversal of 1644133034653 is 3564303314461.

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 902429701369 + 741703333284 = 949963^2 + 861222^2 .

It is a cyclic number.

It is not a de Polignac number, because 1644133034653 - 2¹ = 1644133034651 is a prime.

It is a super-3 number, since 3×1644133034653³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644133034651) 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, 5517224800 + ... + 5517225097.

It is an arithmetic number, because the mean of its divisors is an integer number (413791871175).

Almost surely, 2^{1644133034653} is an apocalyptic number.

It is an amenable number.

1644133034653 is a deficient number, since it is larger than the sum of its proper divisors (11034450047).

1644133034653 is a wasteful number, since it uses less digits than its factorization.

1644133034653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11034450046.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 1644133034653 in words is "one trillion, six hundred forty-four billion, one hundred thirty-three million, thirty-four thousand, six hundred fifty-three".