646220444006 has 16 divisors (see below), whose sum is σ = 981051241968. Its totient is φ = 319203696000.

The previous prime is 646220443933. The next prime is 646220444029. The reversal of 646220444006 is 600444022646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4612346 + ... + 4750386.

It is an arithmetic number, because the mean of its divisors is an integer number (61315702623).

Almost surely, 2^646220444006 is an apocalyptic number.

646220444006 is a deficient number, since it is larger than the sum of its proper divisors (334830797962).

646220444006 is a wasteful number, since it uses less digits than its factorization.

646220444006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166327.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 646220444006 in words is "six hundred forty-six billion, two hundred twenty million, four hundred forty-four thousand, six".