610841681 has 4 divisors (see below), whose sum is σ = 611491764. Its totient is φ = 610191600.

The previous prime is 610841677. The next prime is 610841683. The reversal of 610841681 is 186148016.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130530625 + 480311056 = 11425^2 + 21916^2 .

It is a cyclic number.

It is not a de Polignac number, because 610841681 - 2² = 610841677 is a prime.

It is a super-2 number, since 2×610841681² = 746255118493811522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (610841683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323630 + ... + 325511.

It is an arithmetic number, because the mean of its divisors is an integer number (152872941).

Almost surely, 2^610841681 is an apocalyptic number.

It is an amenable number.

610841681 is a deficient number, since it is larger than the sum of its proper divisors (650083).

610841681 is an equidigital number, since it uses as much as digits as its factorization.

610841681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650082.

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 610841681 is about 24715.2115305534. The cubic root of 610841681 is about 848.4824970314.

Adding to 610841681 its reverse (186148016), we get a palindrome (796989697).

The spelling of 610841681 in words is "six hundred ten million, eight hundred forty-one thousand, six hundred eighty-one".