3243604215440 has 20 divisors (see below), whose sum is σ = 7541379801084. Its totient is φ = 1297441686144.

The previous prime is 3243604215433. The next prime is 3243604215617. The reversal of 3243604215440 is 445124063423.

It can be written as a sum of positive squares in 2 ways, for example, as 2576461578496 + 667142636944 = 1605136^2 + 816788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 3243604215394 and 3243604215403.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20272526267 + ... + 20272526426.

Almost surely, 2^{3243604215440} is an apocalyptic number.

It is an amenable number.

3243604215440 is an abundant number, since it is smaller than the sum of its proper divisors (4297775585644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3243604215440 is a wasteful number, since it uses less digits than its factorization.

3243604215440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40545052706 (or 40545052700 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 38.

Adding to 3243604215440 its reverse (445124063423), we get a palindrome (3688728278863).

The spelling of 3243604215440 in words is "three trillion, two hundred forty-three billion, six hundred four million, two hundred fifteen thousand, four hundred forty".