843956406241 has 9 divisors (see below), whose sum is σ = 913882886931. Its totient is φ = 779025658632.

The previous prime is 843956406133. The next prime is 843956406269. The reversal of 843956406241 is 142604659348.

The square root of 843956406241 is 918671.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 124845622225 + 719110784016 = 353335^2 + 848004^2 .

It is not a de Polignac number, because 843956406241 - 2³¹ = 841808922593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (843956406341) 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 8 ways as a sum of consecutive naturals, for example, 11907390 + ... + 11978056.

Almost surely, 2^843956406241 is an apocalyptic number.

843956406241 is the 918671-st square number.

843956406241 is the 459336-th centered octagonal number.

It is an amenable number.

843956406241 is a deficient number, since it is larger than the sum of its proper divisors (69926480690).

843956406241 is an frugal number, since it uses more digits than its factorization.

843956406241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141360 (or 70680 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 52.

The spelling of 843956406241 in words is "eight hundred forty-three billion, nine hundred fifty-six million, four hundred six thousand, two hundred forty-one".