685271241181 has 8 divisors (see below), whose sum is σ = 685629297144. Its totient is φ = 684913286400.

The previous prime is 685271241169. The next prime is 685271241223. The reversal of 685271241181 is 181142172586.

It can be written as a sum of positive squares in 4 ways, for example, as 63436481956 + 621834759225 = 251866^2 + 788565^2 .

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 685271241181 - 2¹⁷ = 685271110109 is a prime.

It is a super-2 number, since 2×685271241181² (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 (685271241481) 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, 16081155 + ... + 16123711.

It is an arithmetic number, because the mean of its divisors is an integer number (85703662143).

Almost surely, 2^685271241181 is an apocalyptic number.

It is an amenable number.

685271241181 is a deficient number, since it is larger than the sum of its proper divisors (358055963).

685271241181 is a wasteful number, since it uses less digits than its factorization.

685271241181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50591.

The product of its digits is 215040, while the sum is 46.

The spelling of 685271241181 in words is "six hundred eighty-five billion, two hundred seventy-one million, two hundred forty-one thousand, one hundred eighty-one".