640702593140 has 48 divisors (see below), whose sum is σ = 1348929469440. Its totient is φ = 255623427840.

The previous prime is 640702593107. The next prime is 640702593163. The reversal of 640702593140 is 41395207046.

640702593140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 52343141 + ... + 52355379.

It is an arithmetic number, because the mean of its divisors is an integer number (28102697280).

Almost surely, 2^640702593140 is an apocalyptic number.

It is an amenable number.

640702593140 is an abundant number, since it is smaller than the sum of its proper divisors (708226876300).

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

640702593140 is a wasteful number, since it uses less digits than its factorization.

640702593140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18752 (or 18750 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 640702593140 in words is "six hundred forty billion, seven hundred two million, five hundred ninety-three thousand, one hundred forty".