640713205182 has 16 divisors (see below), whose sum is σ = 1281556346112. Its totient is φ = 213549412440.

The previous prime is 640713205177. The next prime is 640713205183. The reversal of 640713205182 is 281502317046.

It is a super-3 number, since 3×640713205182³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 640713205182.

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, 5349828 + ... + 5468279.

It is an arithmetic number, because the mean of its divisors is an integer number (80097271632).

Almost surely, 2^640713205182 is an apocalyptic number.

640713205182 is an abundant number, since it is smaller than the sum of its proper divisors (640843140930).

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

640713205182 is a wasteful number, since it uses less digits than its factorization.

640713205182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10827983.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 640713205182 in words is "six hundred forty billion, seven hundred thirteen million, two hundred five thousand, one hundred eighty-two".