640463515006 has 16 divisors (see below), whose sum is σ = 1121297826816. Its totient is φ = 268644270456.

The previous prime is 640463514991. The next prime is 640463515019. The reversal of 640463515006 is 600515364046.

It is a self number, because there is not a number n which added to its sum of digits gives 640463515006.

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, 486673746 + ... + 486675061.

It is an arithmetic number, because the mean of its divisors is an integer number (70081114176).

Almost surely, 2^640463515006 is an apocalyptic number.

640463515006 is a deficient number, since it is larger than the sum of its proper divisors (480834311810).

640463515006 is a wasteful number, since it uses less digits than its factorization.

640463515006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973348863.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 640463515006 in words is "six hundred forty billion, four hundred sixty-three million, five hundred fifteen thousand, six".