67856646364 has 24 divisors (see below), whose sum is σ = 128730606368. Its totient is φ = 31111041600.

The previous prime is 67856646337. The next prime is 67856646367. The reversal of 67856646364 is 46364665876.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67856646367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4313127 + ... + 4328830.

Almost surely, 2^67856646364 is an apocalyptic number.

It is an amenable number.

67856646364 is a deficient number, since it is larger than the sum of its proper divisors (60873960004).

67856646364 is a wasteful number, since it uses less digits than its factorization.

67856646364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642125 (or 8642123 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 61.

The spelling of 67856646364 in words is "sixty-seven billion, eight hundred fifty-six million, six hundred forty-six thousand, three hundred sixty-four".