42742737673 has 4 divisors (see below), whose sum is σ = 42761235328. Its totient is φ = 42724240020.

The previous prime is 42742737671. The next prime is 42742737683. The reversal of 42742737673 is 37673724724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42742737673 - 2¹ = 42742737671 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42742737673.

It is not an unprimeable number, because it can be changed into a prime (42742737671) 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, 9245361 + ... + 9249982.

It is an arithmetic number, because the mean of its divisors is an integer number (10690308832).

Almost surely, 2^42742737673 is an apocalyptic number.

It is an amenable number.

42742737673 is a deficient number, since it is larger than the sum of its proper divisors (18497655).

42742737673 is a wasteful number, since it uses less digits than its factorization.

42742737673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18497654.

The product of its digits is 8297856, while the sum is 52.

The spelling of 42742737673 in words is "forty-two billion, seven hundred forty-two million, seven hundred thirty-seven thousand, six hundred seventy-three".