821437433421441 has 32 divisors (see below), whose sum is σ = 1141216362037248. Its totient is φ = 525127959921600.

The previous prime is 821437433421439. The next prime is 821437433421499. The reversal of 821437433421441 is 144124334734128.

It is not a de Polignac number, because 821437433421441 - 2¹ = 821437433421439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (821437433421421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190819605 + ... + 195076898.

It is an arithmetic number, because the mean of its divisors is an integer number (35663011313664).

Almost surely, 2^{821437433421441} is an apocalyptic number.

It is an amenable number.

821437433421441 is a deficient number, since it is larger than the sum of its proper divisors (319778928615807).

821437433421441 is a wasteful number, since it uses less digits than its factorization.

821437433421441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385896821.

The product of its digits is 6193152, while the sum is 51.

The spelling of 821437433421441 in words is "eight hundred twenty-one trillion, four hundred thirty-seven billion, four hundred thirty-three million, four hundred twenty-one thousand, four hundred forty-one".