640334612434 has 8 divisors (see below), whose sum is σ = 1047820274928. Its totient is φ = 291061187460.

The previous prime is 640334612399. The next prime is 640334612461. The reversal of 640334612434 is 434216433046.

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, 14553059352 + ... + 14553059395.

It is an arithmetic number, because the mean of its divisors is an integer number (130977534366).

Almost surely, 2^640334612434 is an apocalyptic number.

640334612434 is a deficient number, since it is larger than the sum of its proper divisors (407485662494).

640334612434 is a wasteful number, since it uses less digits than its factorization.

640334612434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29106118760.

The product of its (nonzero) digits is 497664, while the sum is 40.

The spelling of 640334612434 in words is "six hundred forty billion, three hundred thirty-four million, six hundred twelve thousand, four hundred thirty-four".