681022881686 has 16 divisors (see below), whose sum is σ = 1169807424000. Its totient is φ = 291282042600.

The previous prime is 681022881629. The next prime is 681022881701. The reversal of 681022881686 is 686188220186.

It is a Curzon number.

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, 48734990 + ... + 48748961.

It is an arithmetic number, because the mean of its divisors is an integer number (73112964000).

Almost surely, 2^681022881686 is an apocalyptic number.

681022881686 is a deficient number, since it is larger than the sum of its proper divisors (488784542314).

681022881686 is a wasteful number, since it uses less digits than its factorization.

681022881686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97484459.

The product of its (nonzero) digits is 3538944, while the sum is 56.

The spelling of 681022881686 in words is "six hundred eighty-one billion, twenty-two million, eight hundred eighty-one thousand, six hundred eighty-six".