673728753871 has 4 divisors (see below), whose sum is σ = 690161162544. Its totient is φ = 657296345200.

The previous prime is 673728753869. The next prime is 673728753959. The reversal of 673728753871 is 178357827376.

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 673728753871 - 2¹ = 673728753869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (673728753811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8216204275 + ... + 8216204356.

It is an arithmetic number, because the mean of its divisors is an integer number (172540290636).

Almost surely, 2^673728753871 is an apocalyptic number.

673728753871 is a deficient number, since it is larger than the sum of its proper divisors (16432408673).

673728753871 is a wasteful number, since it uses less digits than its factorization.

673728753871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16432408672.

The product of its digits is 82978560, while the sum is 64.

The spelling of 673728753871 in words is "six hundred seventy-three billion, seven hundred twenty-eight million, seven hundred fifty-three thousand, eight hundred seventy-one".