1644232134733 has 6 divisors (see below), whose sum is σ = 1735325328174. Its totient is φ = 1557693600984.

The previous prime is 1644232134689. The next prime is 1644232134793. The reversal of 1644232134733 is 3374312324461.

It can be written as a sum of positive squares in only one way, i.e., 1540185245764 + 104046888969 = 1241042^2 + 322563^2 .

It is not a de Polignac number, because 1644232134733 - 2²¹ = 1644230037581 is a prime.

It is a super-3 number, since 3×1644232134733³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1644232134733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644232134793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2277329466 + ... + 2277330187.

It is an arithmetic number, because the mean of its divisors is an integer number (289220888029).

Almost surely, 2^{1644232134733} is an apocalyptic number.

It is an amenable number.

1644232134733 is a deficient number, since it is larger than the sum of its proper divisors (91093193441).

1644232134733 is an equidigital number, since it uses as much as digits as its factorization.

1644232134733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554659691 (or 4554659672 counting only the distinct ones).

The product of its digits is 870912, while the sum is 43.

The spelling of 1644232134733 in words is "one trillion, six hundred forty-four billion, two hundred thirty-two million, one hundred thirty-four thousand, seven hundred thirty-three".