681209486912 has 28 divisors (see below), whose sum is σ = 1352662843056. Its totient is φ = 340381054080.

The previous prime is 681209486897. The next prime is 681209486939. The reversal of 681209486912 is 219684902186.

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 3 ways as a sum of consecutive naturals, for example, 3396914 + ... + 3591857.

It is an arithmetic number, because the mean of its divisors is an integer number (48309387252).

Almost surely, 2^681209486912 is an apocalyptic number.

It is an amenable number.

681209486912 is a deficient number, since it is larger than the sum of its proper divisors (671453356144).

681209486912 is a wasteful number, since it uses less digits than its factorization.

681209486912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990306 (or 6990296 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 56.

The spelling of 681209486912 in words is "six hundred eighty-one billion, two hundred nine million, four hundred eighty-six thousand, nine hundred twelve".