640300320032 has 12 divisors (see below), whose sum is σ = 1260591255126. Its totient is φ = 320150160000.

The previous prime is 640300320007. The next prime is 640300320059. The reversal of 640300320032 is 230023003046.

It can be written as a sum of positive squares in only one way, i.e., 558433376656 + 81866943376 = 747284^2 + 286124^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10004692469 + ... + 10004692532.

Almost surely, 2^640300320032 is an apocalyptic number.

It is an amenable number.

640300320032 is a deficient number, since it is larger than the sum of its proper divisors (620290935094).

640300320032 is a wasteful number, since it uses less digits than its factorization.

640300320032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009385011 (or 20009385003 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 640300320032 its reverse (230023003046), we get a palindrome (870323323078).

The spelling of 640300320032 in words is "six hundred forty billion, three hundred million, three hundred twenty thousand, thirty-two".