640983052284 has 12 divisors (see below), whose sum is σ = 1495627122024. Its totient is φ = 213661017424.

The previous prime is 640983052253. The next prime is 640983052289. The reversal of 640983052284 is 482250389046.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640983052289) 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 3 ways as a sum of consecutive naturals, for example, 26707627167 + ... + 26707627190.

It is an arithmetic number, because the mean of its divisors is an integer number (124635593502).

Almost surely, 2^640983052284 is an apocalyptic number.

It is an amenable number.

640983052284 is an abundant number, since it is smaller than the sum of its proper divisors (854644069740).

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

640983052284 is a wasteful number, since it uses less digits than its factorization.

640983052284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53415254364 (or 53415254362 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 640983052284 in words is "six hundred forty billion, nine hundred eighty-three million, fifty-two thousand, two hundred eighty-four".