640713205184 has 56 divisors (see below), whose sum is σ = 1371907360320. Its totient is φ = 295132621824.

The previous prime is 640713205183. The next prime is 640713205213. The reversal of 640713205184 is 481502317046.

640713205184 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640713205184² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640713205183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332984 + ... + 1179959.

It is an arithmetic number, because the mean of its divisors is an integer number (24498345720).

Almost surely, 2^640713205184 is an apocalyptic number.

640713205184 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

640713205184 is an abundant number, since it is smaller than the sum of its proper divisors (731194155136).

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

640713205184 is a wasteful number, since it uses less digits than its factorization.

640713205184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513477 (or 1513467 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 640713205184 in words is "six hundred forty billion, seven hundred thirteen million, two hundred five thousand, one hundred eighty-four".