640417230312 has 16 divisors (see below), whose sum is σ = 1601043075840. Its totient is φ = 213472410096.

The previous prime is 640417230307. The next prime is 640417230317. The reversal of 640417230312 is 213032714046.

It is an interprime number because it is at equal distance from previous prime (640417230307) and next prime (640417230317).

It is not an unprimeable number, because it can be changed into a prime (640417230317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13342025608 + ... + 13342025655.

It is an arithmetic number, because the mean of its divisors is an integer number (100065192240).

Almost surely, 2^640417230312 is an apocalyptic number.

It is an amenable number.

640417230312 is an abundant number, since it is smaller than the sum of its proper divisors (960625845528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640417230312 is a wasteful number, since it uses less digits than its factorization.

640417230312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26684051272 (or 26684051268 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

Adding to 640417230312 its reverse (213032714046), we get a palindrome (853449944358).

The spelling of 640417230312 in words is "six hundred forty billion, four hundred seventeen million, two hundred thirty thousand, three hundred twelve".