3635306681 has 2 divisors, whose sum is σ = 3635306682. Its totient is φ = 3635306680.

The previous prime is 3635306677. The next prime is 3635306737. The reversal of 3635306681 is 1866035363.

3635306681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3262237456 + 373069225 = 57116^2 + 19315^2 .

It is a cyclic number.

It is not a de Polignac number, because 3635306681 - 2² = 3635306677 is a prime.

It is a super-2 number, since 2×3635306681² = 26430909329846471522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3635306621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1817653340 + 1817653341.

It is an arithmetic number, because the mean of its divisors is an integer number (1817653341).

Almost surely, 2^3635306681 is an apocalyptic number.

It is an amenable number.

3635306681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3635306681 is an equidigital number, since it uses as much as digits as its factorization.

3635306681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 3635306681 is about 60293.5044677285. The cubic root of 3635306681 is about 1537.6129151963.

The spelling of 3635306681 in words is "three billion, six hundred thirty-five million, three hundred six thousand, six hundred eighty-one".