642465235533 has 8 divisors (see below), whose sum is σ = 934494888096. Its totient is φ = 389372870000.

The previous prime is 642465235523. The next prime is 642465235537. The reversal of 642465235533 is 335532564246.

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 642465235533 - 2⁶ = 642465235469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642465235537) 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 7 ways as a sum of consecutive naturals, for example, 9734321718 + ... + 9734321783.

It is an arithmetic number, because the mean of its divisors is an integer number (116811861012).

Almost surely, 2^642465235533 is an apocalyptic number.

It is an amenable number.

642465235533 is a deficient number, since it is larger than the sum of its proper divisors (292029652563).

642465235533 is a wasteful number, since it uses less digits than its factorization.

642465235533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19468643515.

The product of its digits is 7776000, while the sum is 48.

Adding to 642465235533 its reverse (335532564246), we get a palindrome (977997799779).

The spelling of 642465235533 in words is "six hundred forty-two billion, four hundred sixty-five million, two hundred thirty-five thousand, five hundred thirty-three".