67734320646 has 16 divisors (see below), whose sum is σ = 136217089008. Its totient is φ = 22453365600.

The previous prime is 67734320629. The next prime is 67734320677. The reversal of 67734320646 is 64602343776.

It is a junction number, because it is equal to n+sod(n) for n = 67734320595 and 67734320604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31184145 + ... + 31186316.

It is an arithmetic number, because the mean of its divisors is an integer number (8513568063).

Almost surely, 2^67734320646 is an apocalyptic number.

67734320646 is an abundant number, since it is smaller than the sum of its proper divisors (68482768362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67734320646 is a wasteful number, since it uses less digits than its factorization.

67734320646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62370647.

The product of its (nonzero) digits is 3048192, while the sum is 48.

The spelling of 67734320646 in words is "sixty-seven billion, seven hundred thirty-four million, three hundred twenty thousand, six hundred forty-six".