681003533871 has 6 divisors (see below), whose sum is σ = 983671771160. Its totient is φ = 454002355908.

The previous prime is 681003533867. The next prime is 681003533911. The reversal of 681003533871 is 178335300186.

681003533871 is a `hidden beast` number, since 6 + 8 + 100 + 3 + 533 + 8 + 7 + 1 = 666.

It is not a de Polignac number, because 681003533871 - 2² = 681003533867 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 (681003533801) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 37833529651 + ... + 37833529668.

Almost surely, 2^681003533871 is an apocalyptic number.

681003533871 is a deficient number, since it is larger than the sum of its proper divisors (302668237289).

681003533871 is a wasteful number, since it uses less digits than its factorization.

681003533871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75667059325 (or 75667059322 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 681003533871 in words is "six hundred eighty-one billion, three million, five hundred thirty-three thousand, eight hundred seventy-one".