640344314606 has 8 divisors (see below), whose sum is σ = 960592422024. Its totient is φ = 320146840600.

The previous prime is 640344314573. The next prime is 640344314627. The reversal of 640344314606 is 606413443046.

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

It is a congruent number.

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, 12626720 + ... + 12677331.

It is an arithmetic number, because the mean of its divisors is an integer number (120074052753).

Almost surely, 2^640344314606 is an apocalyptic number.

640344314606 is a deficient number, since it is larger than the sum of its proper divisors (320248107418).

640344314606 is a wasteful number, since it uses less digits than its factorization.

640344314606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25316706.

The product of its (nonzero) digits is 497664, while the sum is 41.

The spelling of 640344314606 in words is "six hundred forty billion, three hundred forty-four million, three hundred fourteen thousand, six hundred six".