640852669280 has 96 divisors (see below), whose sum is σ = 1617261375744. Its totient is φ = 239127003136.

The previous prime is 640852669273. The next prime is 640852669333. The reversal of 640852669280 is 82966258046.

640852669280 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, 735152 + ... + 1349871.

It is an arithmetic number, because the mean of its divisors is an integer number (16846472664).

Almost surely, 2^640852669280 is an apocalyptic number.

It is an amenable number.

640852669280 is an abundant number, since it is smaller than the sum of its proper divisors (976408706464).

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

640852669280 is a wasteful number, since it uses less digits than its factorization.

640852669280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085168 (or 2085160 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 640852669280 in words is "six hundred forty billion, eight hundred fifty-two million, six hundred sixty-nine thousand, two hundred eighty".