640504254326 has 8 divisors (see below), whose sum is σ = 960770049624. Its totient is φ = 320247571120.

The previous prime is 640504254317. The next prime is 640504254337. The reversal of 640504254326 is 623452405046.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099495 + ... + 2385138.

It is an arithmetic number, because the mean of its divisors is an integer number (120096256203).

Almost surely, 2^640504254326 is an apocalyptic number.

640504254326 is a deficient number, since it is larger than the sum of its proper divisors (320265795298).

640504254326 is a wasteful number, since it uses less digits than its factorization.

640504254326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556046.

The product of its (nonzero) digits is 691200, while the sum is 41.

The spelling of 640504254326 in words is "six hundred forty billion, five hundred four million, two hundred fifty-four thousand, three hundred twenty-six".