6440202420606 has 16 divisors (see below), whose sum is σ = 14311560934800. Its totient is φ = 2146734140184.

The previous prime is 6440202420601. The next prime is 6440202420623. The reversal of 6440202420606 is 6060242020446.

6440202420606 is a `hidden beast` number, since 6 + 4 + 4 + 0 + 2 + 0 + 2 + 42 + 0 + 606 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440202420601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59631503841 + ... + 59631503948.

It is an arithmetic number, because the mean of its divisors is an integer number (894472558425).

Almost surely, 2^{6440202420606} is an apocalyptic number.

6440202420606 is an abundant number, since it is smaller than the sum of its proper divisors (7871358514194).

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

6440202420606 is a wasteful number, since it uses less digits than its factorization.

6440202420606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119263007800 (or 119263007794 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 6440202420606 in words is "six trillion, four hundred forty billion, two hundred two million, four hundred twenty thousand, six hundred six".