640320168341 has 4 divisors (see below), whose sum is σ = 731794478112. Its totient is φ = 548845858572.

The previous prime is 640320168317. The next prime is 640320168359. The reversal of 640320168341 is 143861023046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 640320168341 - 2¹⁸ = 640319906197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 640320168295 and 640320168304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640320108341) 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 3 ways as a sum of consecutive naturals, for example, 45737154875 + ... + 45737154888.

It is an arithmetic number, because the mean of its divisors is an integer number (182948619528).

Almost surely, 2^640320168341 is an apocalyptic number.

It is an amenable number.

640320168341 is a deficient number, since it is larger than the sum of its proper divisors (91474309771).

640320168341 is an equidigital number, since it uses as much as digits as its factorization.

640320168341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91474309770.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 640320168341 in words is "six hundred forty billion, three hundred twenty million, one hundred sixty-eight thousand, three hundred forty-one".