681332714208 has 72 divisors (see below), whose sum is σ = 1937713364496. Its totient is φ = 227090572800.

The previous prime is 681332714143. The next prime is 681332714281. The reversal of 681332714208 is 802417233186.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3307348 + ... + 3507308.

It is an arithmetic number, because the mean of its divisors is an integer number (26912685618).

Almost surely, 2^681332714208 is an apocalyptic number.

It is an amenable number.

681332714208 is an abundant number, since it is smaller than the sum of its proper divisors (1256380650288).

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

681332714208 is a wasteful number, since it uses less digits than its factorization.

681332714208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211808 (or 211797 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 681332714208 in words is "six hundred eighty-one billion, three hundred thirty-two million, seven hundred fourteen thousand, two hundred eight".