640328416005 has 32 divisors (see below), whose sum is σ = 1057867776000. Its totient is φ = 330400491840.

The previous prime is 640328415989. The next prime is 640328416027. The reversal of 640328416005 is 500614823046.

It is not a de Polignac number, because 640328416005 - 2⁴ = 640328415989 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1504996 + ... + 1882994.

It is an arithmetic number, because the mean of its divisors is an integer number (33058368000).

Almost surely, 2^640328416005 is an apocalyptic number.

It is an amenable number.

640328416005 is a deficient number, since it is larger than the sum of its proper divisors (417539359995).

640328416005 is a wasteful number, since it uses less digits than its factorization.

640328416005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381681.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 640328416005 in words is "six hundred forty billion, three hundred twenty-eight million, four hundred sixteen thousand, five".