640266422416 has 40 divisors (see below), whose sum is σ = 1243319172480. Its totient is φ = 319410214656.

The previous prime is 640266422333. The next prime is 640266422417. The reversal of 640266422416 is 614224662046.

It is not an unprimeable number, because it can be changed into a prime (640266422417) 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, 38050581 + ... + 38067403.

It is an arithmetic number, because the mean of its divisors is an integer number (31082979312).

Almost surely, 2^640266422416 is an apocalyptic number.

It is an amenable number.

640266422416 is a deficient number, since it is larger than the sum of its proper divisors (603052750064).

640266422416 is a wasteful number, since it uses less digits than its factorization.

640266422416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22063 (or 22057 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 640266422416 in words is "six hundred forty billion, two hundred sixty-six million, four hundred twenty-two thousand, four hundred sixteen".