3941665756813 has 2 divisors, whose sum is σ = 3941665756814. Its totient is φ = 3941665756812.

The previous prime is 3941665756771. The next prime is 3941665756981. The reversal of 3941665756813 is 3186575661493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3764170381609 + 177495375204 = 1940147^2 + 421302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3941665756813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3941665756213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1970832878406 + 1970832878407.

It is an arithmetic number, because the mean of its divisors is an integer number (1970832878407).

Almost surely, 2^{3941665756813} is an apocalyptic number.

It is an amenable number.

3941665756813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3941665756813 is an equidigital number, since it uses as much as digits as its factorization.

3941665756813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97977600, while the sum is 64.

The spelling of 3941665756813 in words is "three trillion, nine hundred forty-one billion, six hundred sixty-five million, seven hundred fifty-six thousand, eight hundred thirteen".