6406363253440 has 56 divisors (see below), whose sum is σ = 15255385633440. Its totient is φ = 2562506139648.

The previous prime is 6406363253419. The next prime is 6406363253449. The reversal of 6406363253440 is 443523636046.

It is not an unprimeable number, because it can be changed into a prime (6406363253449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30237796 + ... + 30448924.

Almost surely, 2^{6406363253440} is an apocalyptic number.

It is an amenable number.

6406363253440 is an abundant number, since it is smaller than the sum of its proper divisors (8849022380000).

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

6406363253440 is a wasteful number, since it uses less digits than its factorization.

6406363253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305969 (or 305959 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 46.

Adding to 6406363253440 its reverse (443523636046), we get a palindrome (6849886889486).

The spelling of 6406363253440 in words is "six trillion, four hundred six billion, three hundred sixty-three million, two hundred fifty-three thousand, four hundred forty".