640063640064 has 40 divisors (see below), whose sum is σ = 1705169545200. Its totient is φ = 213354546176.

The previous prime is 640063640039. The next prime is 640063640089. The reversal of 640063640064 is 460046360046.

It is an interprime number because it is at equal distance from previous prime (640063640039) and next prime (640063640089).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208352514 + ... + 208355585.

It is an arithmetic number, because the mean of its divisors is an integer number (42629238630).

Almost surely, 2^640063640064 is an apocalyptic number.

640063640064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

640063640064 is an abundant number, since it is smaller than the sum of its proper divisors (1065105905136).

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

640063640064 is an equidigital number, since it uses as much as digits as its factorization.

640063640064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416708120 (or 416708104 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The spelling of 640063640064 in words is "six hundred forty billion, sixty-three million, six hundred forty thousand, sixty-four".