640313520202056 has 64 divisors (see below), whose sum is σ = 1623401664768000. Its totient is φ = 210422390068800.

The previous prime is 640313520202051. The next prime is 640313520202093. The reversal of 640313520202056 is 650202025313046.

It is not an unprimeable number, because it can be changed into a prime (640313520202051) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 30401841 + ... + 46956351.

It is an arithmetic number, because the mean of its divisors is an integer number (25365651012000).

Almost surely, 2^{640313520202056} is an apocalyptic number.

It is an amenable number.

640313520202056 is an abundant number, since it is smaller than the sum of its proper divisors (983088144565944).

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

640313520202056 is a wasteful number, since it uses less digits than its factorization.

640313520202056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16577290 (or 16577286 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 640313520202056 in words is "six hundred forty trillion, three hundred thirteen billion, five hundred twenty million, two hundred two thousand, fifty-six".