640325304253 has 8 divisors (see below), whose sum is σ = 644185164672. Its totient is φ = 636465748656.

The previous prime is 640325304251. The next prime is 640325304259. The reversal of 640325304253 is 352403523046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640325304253 - 2¹ = 640325304251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640325304251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5258251 + ... + 5378647.

It is an arithmetic number, because the mean of its divisors is an integer number (80523145584).

Almost surely, 2^640325304253 is an apocalyptic number.

It is an amenable number.

640325304253 is a deficient number, since it is larger than the sum of its proper divisors (3859860419).

640325304253 is a wasteful number, since it uses less digits than its factorization.

640325304253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152411.

The product of its (nonzero) digits is 259200, while the sum is 37.

Adding to 640325304253 its reverse (352403523046), we get a palindrome (992728827299).

The spelling of 640325304253 in words is "six hundred forty billion, three hundred twenty-five million, three hundred four thousand, two hundred fifty-three".