640351314023 has 4 divisors (see below), whose sum is σ = 640518905208. Its totient is φ = 640183722840.

The previous prime is 640351314013. The next prime is 640351314049. The reversal of 640351314023 is 320413153046.

640351314023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 640351314023 - 2¹⁰ = 640351312999 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 (640351314013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83789861 + ... + 83797502.

It is an arithmetic number, because the mean of its divisors is an integer number (160129726302).

Almost surely, 2^640351314023 is an apocalyptic number.

640351314023 is a deficient number, since it is larger than the sum of its proper divisors (167591185).

640351314023 is a wasteful number, since it uses less digits than its factorization.

640351314023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167591184.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 640351314023 its reverse (320413153046), we get a palindrome (960764467069).

The spelling of 640351314023 in words is "six hundred forty billion, three hundred fifty-one million, three hundred fourteen thousand, twenty-three".