6405450040 has 64 divisors (see below), whose sum is σ = 15733841760. Its totient is φ = 2327569920.

The previous prime is 6405450019. The next prime is 6405450041. The reversal of 6405450040 is 400545046.

It is a junction number, because it is equal to n+sod(n) for n = 6405449990 and 6405450008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405450041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 715834 + ... + 724726.

Almost surely, 2^6405450040 is an apocalyptic number.

It is an amenable number.

6405450040 is an abundant number, since it is smaller than the sum of its proper divisors (9328391720).

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

6405450040 is a wasteful number, since it uses less digits than its factorization.

6405450040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10552 (or 10548 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 6405450040 is about 80034.0555013927. The cubic root of 6405450040 is about 1857.1624015187.

Adding to 6405450040 its reverse (400545046), we get a palindrome (6805995086).

The spelling of 6405450040 in words is "six billion, four hundred five million, four hundred fifty thousand, forty".