640313043260 has 48 divisors (see below), whose sum is σ = 1514218309632. Its totient is φ = 225330100800.

The previous prime is 640313043247. The next prime is 640313043283. The reversal of 640313043260 is 62340313046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46936952 + ... + 46950591.

It is an arithmetic number, because the mean of its divisors is an integer number (31546214784).

Almost surely, 2^640313043260 is an apocalyptic number.

It is an amenable number.

640313043260 is an abundant number, since it is smaller than the sum of its proper divisors (873905266372).

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

640313043260 is a wasteful number, since it uses less digits than its factorization.

640313043260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93887594 (or 93887592 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The spelling of 640313043260 in words is "six hundred forty billion, three hundred thirteen million, forty-three thousand, two hundred sixty".