6443821435541 has 12 divisors (see below), whose sum is σ = 7564643406540. Its totient is φ = 5472603259200.

The previous prime is 6443821435531. The next prime is 6443821435549. The reversal of 6443821435541 is 1455341283446.

It can be written as a sum of positive squares in 2 ways, for example, as 2669073712900 + 3774747722641 = 1633730^2 + 1942871^2 .

It is not a de Polignac number, because 6443821435541 - 2¹⁸ = 6443821173397 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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 6443821435541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443821435549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 603235760 + ... + 603246441.

It is an arithmetic number, because the mean of its divisors is an integer number (630386950545).

Almost surely, 2^{6443821435541} is an apocalyptic number.

It is an amenable number.

6443821435541 is a deficient number, since it is larger than the sum of its proper divisors (1120821970999).

6443821435541 is a wasteful number, since it uses less digits than its factorization.

6443821435541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206482324 (or 1206482317 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 50.

The spelling of 6443821435541 in words is "six trillion, four hundred forty-three billion, eight hundred twenty-one million, four hundred thirty-five thousand, five hundred forty-one".