42505421793 has 8 divisors (see below), whose sum is σ = 60007654368. Its totient is φ = 26670068544.

The previous prime is 42505421789. The next prime is 42505421813. The reversal of 42505421793 is 39712450524.

It is a happy number.

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

It is not a de Polignac number, because 42505421793 - 2² = 42505421789 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42505421093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416719771 + ... + 416719872.

It is an arithmetic number, because the mean of its divisors is an integer number (7500956796).

Almost surely, 2^42505421793 is an apocalyptic number.

It is an amenable number.

42505421793 is a deficient number, since it is larger than the sum of its proper divisors (17502232575).

42505421793 is a wasteful number, since it uses less digits than its factorization.

42505421793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833439663.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 42505421793 in words is "forty-two billion, five hundred five million, four hundred twenty-one thousand, seven hundred ninety-three".