3506706242681 has 2 divisors, whose sum is σ = 3506706242682. Its totient is φ = 3506706242680.

The previous prime is 3506706242597. The next prime is 3506706242693. The reversal of 3506706242681 is 1862426076053.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2787093352681 + 719612890000 = 1669459^2 + 848300^2 .

It is a cyclic number.

It is not a de Polignac number, because 3506706242681 - 2¹⁸ = 3506705980537 is a prime.

It is a super-2 number, since 2×3506706242681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3506706292681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1753353121340 + 1753353121341.

It is an arithmetic number, because the mean of its divisors is an integer number (1753353121341).

Almost surely, 2^{3506706242681} is an apocalyptic number.

It is an amenable number.

3506706242681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3506706242681 is an equidigital number, since it uses as much as digits as its factorization.

3506706242681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 3506706242681 in words is "three trillion, five hundred six billion, seven hundred six million, two hundred forty-two thousand, six hundred eighty-one".