1644652434443 has 2 divisors, whose sum is σ = 1644652434444. Its totient is φ = 1644652434442.

The previous prime is 1644652434437. The next prime is 1644652434479. The reversal of 1644652434443 is 3444342564461.

It is a weak prime.

It is an emirp because it is prime and its reverse (3444342564461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1644652434443 - 2⁴ = 1644652434427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1644652434391 and 1644652434400.

It is not a weakly prime, because it can be changed into another prime (1644652434743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822326217221 + 822326217222.

It is an arithmetic number, because the mean of its divisors is an integer number (822326217222).

Almost surely, 2^{1644652434443} is an apocalyptic number.

1644652434443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1644652434443 is an equidigital number, since it uses as much as digits as its factorization.

1644652434443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13271040, while the sum is 50.

The spelling of 1644652434443 in words is "one trillion, six hundred forty-four billion, six hundred fifty-two million, four hundred thirty-four thousand, four hundred forty-three".