67728805583 has 4 divisors (see below), whose sum is σ = 69559313880. Its totient is φ = 65898297288.

The previous prime is 67728805531. The next prime is 67728805589. The reversal of 67728805583 is 38550882776.

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 67728805583 - 2¹² = 67728801487 is a prime.

It is a super-2 number, since 2×67728805583² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67728805589) by changing a digit.

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, 915254093 + ... + 915254166.

It is an arithmetic number, because the mean of its divisors is an integer number (17389828470).

Almost surely, 2^67728805583 is an apocalyptic number.

67728805583 is a deficient number, since it is larger than the sum of its proper divisors (1830508297).

67728805583 is a wasteful number, since it uses less digits than its factorization.

67728805583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830508296.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 67728805583 in words is "sixty-seven billion, seven hundred twenty-eight million, eight hundred five thousand, five hundred eighty-three".