681305108201 has 8 divisors (see below), whose sum is σ = 716785072584. Its totient is φ = 646723370880.

The previous prime is 681305108171. The next prime is 681305108227. The reversal of 681305108201 is 102801503186.

It can be written as a sum of positive squares in 4 ways, for example, as 247656517801 + 433648590400 = 497651^2 + 658520^2 .

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 681305108201 - 2⁶ = 681305108137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681305108501) 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 7 ways as a sum of consecutive naturals, for example, 224555210 + ... + 224558243.

It is an arithmetic number, because the mean of its divisors is an integer number (89598134073).

Almost surely, 2^681305108201 is an apocalyptic number.

It is an amenable number.

681305108201 is a deficient number, since it is larger than the sum of its proper divisors (35479964383).

681305108201 is a wasteful number, since it uses less digits than its factorization.

681305108201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449113531.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 681305108201 in words is "six hundred eighty-one billion, three hundred five million, one hundred eight thousand, two hundred one".