67745637812 has 6 divisors (see below), whose sum is σ = 118554866178. Its totient is φ = 33872818904.

The previous prime is 67745637787. The next prime is 67745637821. The reversal of 67745637812 is 21873654776.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 34356846736 + 33388791076 = 185356^2 + 182726^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8468204723 + ... + 8468204730.

It is an arithmetic number, because the mean of its divisors is an integer number (19759144363).

Almost surely, 2^67745637812 is an apocalyptic number.

It is an amenable number.

67745637812 is a deficient number, since it is larger than the sum of its proper divisors (50809228366).

67745637812 is a wasteful number, since it uses less digits than its factorization.

67745637812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16936409457 (or 16936409455 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 56.

The spelling of 67745637812 in words is "sixty-seven billion, seven hundred forty-five million, six hundred thirty-seven thousand, eight hundred twelve".