42289721673 has 8 divisors (see below), whose sum is σ = 58837873728. Its totient is φ = 26967358704.

The previous prime is 42289721671. The next prime is 42289721699. The reversal of 42289721673 is 37612798224.

42289721673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42289721673 - 2¹ = 42289721671 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (42289721671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306447190 + ... + 306447327.

It is an arithmetic number, because the mean of its divisors is an integer number (7354734216).

Almost surely, 2^42289721673 is an apocalyptic number.

It is an amenable number.

42289721673 is a deficient number, since it is larger than the sum of its proper divisors (16548152055).

42289721673 is a wasteful number, since it uses less digits than its factorization.

42289721673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612894543.

The product of its digits is 2032128, while the sum is 51.

The spelling of 42289721673 in words is "forty-two billion, two hundred eighty-nine million, seven hundred twenty-one thousand, six hundred seventy-three".