3681706735381 has 4 divisors (see below), whose sum is σ = 3742062583564. Its totient is φ = 3621350887200.

The previous prime is 3681706735349. The next prime is 3681706735411. The reversal of 3681706735381 is 1835376071863.

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 1543721761156 + 2137984974225 = 1242466^2 + 1462185^2 .

It is a cyclic number.

It is not a de Polignac number, because 3681706735381 - 2⁵ = 3681706735349 is a prime.

It is a super-2 number, since 2×3681706735381² (a number of 26 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 (3681706735331) 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 3 ways as a sum of consecutive naturals, for example, 30177924000 + ... + 30177924121.

It is an arithmetic number, because the mean of its divisors is an integer number (935515645891).

Almost surely, 2^{3681706735381} is an apocalyptic number.

It is an amenable number.

3681706735381 is a deficient number, since it is larger than the sum of its proper divisors (60355848183).

3681706735381 is an equidigital number, since it uses as much as digits as its factorization.

3681706735381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60355848182.

The product of its (nonzero) digits is 15240960, while the sum is 58.

The spelling of 3681706735381 in words is "three trillion, six hundred eighty-one billion, seven hundred six million, seven hundred thirty-five thousand, three hundred eighty-one".