640322466130 has 32 divisors (see below), whose sum is σ = 1155986080128. Its totient is φ = 255372768000.

The previous prime is 640322466103. The next prime is 640322466137. The reversal of 640322466130 is 31664223046.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 640322466130.

It is not an unprimeable number, because it can be changed into a prime (640322466137) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 8958835 + ... + 9030025.

It is an arithmetic number, because the mean of its divisors is an integer number (36124565004).

Almost surely, 2^640322466130 is an apocalyptic number.

640322466130 is a deficient number, since it is larger than the sum of its proper divisors (515663613998).

640322466130 is a wasteful number, since it uses less digits than its factorization.

640322466130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73842.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 640322466130 its reverse (31664223046), we get a palindrome (671986689176).

The spelling of 640322466130 in words is "six hundred forty billion, three hundred twenty-two million, four hundred sixty-six thousand, one hundred thirty".