3240443387646 has 24 divisors (see below), whose sum is σ = 7074555798024. Its totient is φ = 1071902392080.

The previous prime is 3240443387641. The next prime is 3240443387653. The reversal of 3240443387646 is 6467833440423.

It is a happy number.

3240443387646 is a `hidden beast` number, since 3 + 240 + 4 + 4 + 338 + 7 + 64 + 6 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3240443387592 and 3240443387601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3240443387641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 687114561 + ... + 687119276.

It is an arithmetic number, because the mean of its divisors is an integer number (294773158251).

Almost surely, 2^{3240443387646} is an apocalyptic number.

3240443387646 is an abundant number, since it is smaller than the sum of its proper divisors (3834112410378).

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

3240443387646 is a wasteful number, since it uses less digits than its factorization.

3240443387646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374233976 (or 1374233973 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 54.

The spelling of 3240443387646 in words is "three trillion, two hundred forty billion, four hundred forty-three million, three hundred eighty-seven thousand, six hundred forty-six".