681576120063 has 12 divisors (see below), whose sum is σ = 989938062568. Its totient is φ = 451873669680.

The previous prime is 681576120047. The next prime is 681576120077. The reversal of 681576120063 is 360021675186.

681576120063 is a `hidden beast` number, since 6 + 8 + 1 + 576 + 12 + 0 + 0 + 63 = 666.

It is not a de Polignac number, because 681576120063 - 2⁴ = 681576120047 is a prime.

It is a super-2 number, since 2×681576120063² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681576220063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209199145 + ... + 209202402.

Almost surely, 2^681576120063 is an apocalyptic number.

681576120063 is a deficient number, since it is larger than the sum of its proper divisors (308361942505).

681576120063 is a wasteful number, since it uses less digits than its factorization.

681576120063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418401734 (or 418401731 counting only the distinct ones).

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

The spelling of 681576120063 in words is "six hundred eighty-one billion, five hundred seventy-six million, one hundred twenty thousand, sixty-three".