642440520303 has 32 divisors (see below), whose sum is σ = 894239704512. Its totient is φ = 409870156800.

The previous prime is 642440520289. The next prime is 642440520313. The reversal of 642440520303 is 303025044246.

It is not a de Polignac number, because 642440520303 - 2²⁰ = 642439471727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642440520313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38981901 + ... + 38998377.

It is an arithmetic number, because the mean of its divisors is an integer number (27944990766).

Almost surely, 2^642440520303 is an apocalyptic number.

642440520303 is a deficient number, since it is larger than the sum of its proper divisors (251799184209).

642440520303 is a wasteful number, since it uses less digits than its factorization.

642440520303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22555.

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 642440520303 its reverse (303025044246), we get a palindrome (945465564549).

The spelling of 642440520303 in words is "six hundred forty-two billion, four hundred forty million, five hundred twenty thousand, three hundred three".