821424748433 has 4 divisors (see below), whose sum is σ = 869743851300. Its totient is φ = 773105645568.

The previous prime is 821424748423. The next prime is 821424748447. The reversal of 821424748433 is 334847424128.

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 349856871169 + 471567877264 = 591487^2 + 686708^2 .

It is a cyclic number.

It is not a de Polignac number, because 821424748433 - 2²⁰ = 821423699857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821424748423) 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 in 3 ways as a sum of consecutive naturals, for example, 24159551408 + ... + 24159551441.

It is an arithmetic number, because the mean of its divisors is an integer number (217435962825).

Almost surely, 2^821424748433 is an apocalyptic number.

It is an amenable number.

821424748433 is a deficient number, since it is larger than the sum of its proper divisors (48319102867).

821424748433 is a wasteful number, since it uses less digits than its factorization.

821424748433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48319102866.

The product of its digits is 4128768, while the sum is 50.

The spelling of 821424748433 in words is "eight hundred twenty-one billion, four hundred twenty-four million, seven hundred forty-eight thousand, four hundred thirty-three".