640552315140266 has 8 divisors (see below), whose sum is σ = 960828828400224. Its totient is φ = 320276039006860.

The previous prime is 640552315140253. The next prime is 640552315140299. The reversal of 640552315140266 is 662041513255046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52367060 + ... + 63430383.

It is an arithmetic number, because the mean of its divisors is an integer number (120103603550028).

Almost surely, 2^{640552315140266} is an apocalyptic number.

640552315140266 is a deficient number, since it is larger than the sum of its proper divisors (320276513259958).

640552315140266 is a wasteful number, since it uses less digits than its factorization.

640552315140266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118563276.

The product of its (nonzero) digits is 5184000, while the sum is 50.

The spelling of 640552315140266 in words is "six hundred forty trillion, five hundred fifty-two billion, three hundred fifteen million, one hundred forty thousand, two hundred sixty-six".