640334454603 has 24 divisors (see below), whose sum is σ = 894442762752. Its totient is φ = 407446829328.

The previous prime is 640334454593. The next prime is 640334454611. The reversal of 640334454603 is 306454433046.

It is a happy number.

It is not a de Polignac number, because 640334454603 - 2⁴ = 640334454587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640334454623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 299050 + ... + 1170512.

It is an arithmetic number, because the mean of its divisors is an integer number (37268448448).

Almost surely, 2^640334454603 is an apocalyptic number.

640334454603 is a deficient number, since it is larger than the sum of its proper divisors (254108308149).

640334454603 is a wasteful number, since it uses less digits than its factorization.

640334454603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871975 (or 871952 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 42.

Adding to 640334454603 its reverse (306454433046), we get a palindrome (946788887649).

The spelling of 640334454603 in words is "six hundred forty billion, three hundred thirty-four million, four hundred fifty-four thousand, six hundred three".