681851675207 has 8 divisors (see below), whose sum is σ = 753350188896. Its totient is φ = 613840893952.

The previous prime is 681851675201. The next prime is 681851675227. The reversal of 681851675207 is 702576158186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681851675207 - 2²² = 681847480903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681851675201) by changing a digit.

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, 871932698 + ... + 871933479.

It is an arithmetic number, because the mean of its divisors is an integer number (94168773612).

Almost surely, 2^681851675207 is an apocalyptic number.

681851675207 is a deficient number, since it is larger than the sum of its proper divisors (71498513689).

681851675207 is a wasteful number, since it uses less digits than its factorization.

681851675207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743866217.

The product of its (nonzero) digits is 5644800, while the sum is 56.

The spelling of 681851675207 in words is "six hundred eighty-one billion, eight hundred fifty-one million, six hundred seventy-five thousand, two hundred seven".