67729517812 has 24 divisors (see below), whose sum is σ = 134923626432. Its totient is φ = 29447616000.

The previous prime is 67729517809. The next prime is 67729517831. The reversal of 67729517812 is 21871592776.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33462189 + ... + 33464212.

It is an arithmetic number, because the mean of its divisors is an integer number (5621817768).

Almost surely, 2^67729517812 is an apocalyptic number.

It is an amenable number.

67729517812 is a deficient number, since it is larger than the sum of its proper divisors (67194108620).

67729517812 is a wasteful number, since it uses less digits than its factorization.

67729517812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66926439 (or 66926437 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 55.

The spelling of 67729517812 in words is "sixty-seven billion, seven hundred twenty-nine million, five hundred seventeen thousand, eight hundred twelve".