642330534047 has 4 divisors (see below), whose sum is σ = 676137404280. Its totient is φ = 608523663816.

The previous prime is 642330533993. The next prime is 642330534119. The reversal of 642330534047 is 740435033246.

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 642330534047 - 2²⁰ = 642329485471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642330533995 and 642330534013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642330530047) 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 3 ways as a sum of consecutive naturals, for example, 16903435088 + ... + 16903435125.

It is an arithmetic number, because the mean of its divisors is an integer number (169034351070).

Almost surely, 2^642330534047 is an apocalyptic number.

642330534047 is a deficient number, since it is larger than the sum of its proper divisors (33806870233).

642330534047 is a wasteful number, since it uses less digits than its factorization.

642330534047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33806870232.

The product of its (nonzero) digits is 725760, while the sum is 41.

The spelling of 642330534047 in words is "six hundred forty-two billion, three hundred thirty million, five hundred thirty-four thousand, forty-seven".