1644241371243 has 8 divisors (see below), whose sum is σ = 2200411577856. Its totient is φ = 1092116039400.

The previous prime is 1644241371221. The next prime is 1644241371281. The reversal of 1644241371243 is 3421731424461.

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

It is not a de Polignac number, because 1644241371243 - 2¹⁴ = 1644241354859 is a prime.

It is a super-3 number, since 3×1644241371243³ (a number of 38 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1644241371195 and 1644241371204.

It is not an unprimeable number, because it can be changed into a prime (1644241371343) 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, 1011217743 + ... + 1011219368.

It is an arithmetic number, because the mean of its divisors is an integer number (275051447232).

Almost surely, 2^{1644241371243} is an apocalyptic number.

1644241371243 is a deficient number, since it is larger than the sum of its proper divisors (556170206613).

1644241371243 is a wasteful number, since it uses less digits than its factorization.

1644241371243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022437385.

The product of its digits is 387072, while the sum is 42.

The spelling of 1644241371243 in words is "one trillion, six hundred forty-four billion, two hundred forty-one million, three hundred seventy-one thousand, two hundred forty-three".