3956486750681 has 2 divisors, whose sum is σ = 3956486750682. Its totient is φ = 3956486750680.

The previous prime is 3956486750663. The next prime is 3956486750773. The reversal of 3956486750681 is 1860576846593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3576198695056 + 380288055625 = 1891084^2 + 616675^2 .

It is a cyclic number.

It is not a de Polignac number, because 3956486750681 - 2¹⁴ = 3956486734297 is a prime.

It is a super-2 number, since 2×3956486750681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3956486750581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978243375340 + 1978243375341.

It is an arithmetic number, because the mean of its divisors is an integer number (1978243375341).

Almost surely, 2^{3956486750681} is an apocalyptic number.

It is an amenable number.

3956486750681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956486750681 is an equidigital number, since it uses as much as digits as its factorization.

3956486750681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 261273600, while the sum is 68.

The spelling of 3956486750681 in words is "three trillion, nine hundred fifty-six billion, four hundred eighty-six million, seven hundred fifty thousand, six hundred eighty-one".