681732600241 has 27 divisors (see below), whose sum is σ = 871765367193. Its totient is φ = 531170667720.

The previous prime is 681732600233. The next prime is 681732600247. The reversal of 681732600241 is 142006237186.

The square root of 681732600241 is 825671.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 681732600241 - 2³ = 681732600233 is a prime.

It is a super-2 number, since 2×681732600241² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681732600194 and 681732600203.

It is not an unprimeable number, because it can be changed into a prime (681732600247) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 63571306 + ... + 63582028.

Almost surely, 2^681732600241 is an apocalyptic number.

681732600241 is the 825671-st square number.

681732600241 is the 412836-th centered octagonal number.

It is an amenable number.

681732600241 is a deficient number, since it is larger than the sum of its proper divisors (190032766952).

681732600241 is an frugal number, since it uses more digits than its factorization.

681732600241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21482 (or 10741 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 681732600241 in words is "six hundred eighty-one billion, seven hundred thirty-two million, six hundred thousand, two hundred forty-one".