642074207420742 has 8 divisors (see below), whose sum is σ = 1284148414841496. Its totient is φ = 214024735806912.

The previous prime is 642074207420567. The next prime is 642074207420771. The reversal of 642074207420742 is 247024702470246.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

642074207420742 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53506183951723 + ... + 53506183951734.

It is an arithmetic number, because the mean of its divisors is an integer number (160518551855187).

Almost surely, 2^{642074207420742} is an apocalyptic number.

642074207420742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642074207420742 is a wasteful number, since it uses less digits than its factorization.

642074207420742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107012367903462.

The product of its (nonzero) digits is 8429568, while the sum is 51.

Adding to 642074207420742 its reverse (247024702470246), we get a palindrome (889098909890988).

The spelling of 642074207420742 in words is "six hundred forty-two trillion, seventy-four billion, two hundred seven million, four hundred twenty thousand, seven hundred forty-two".