3961540607993 has 2 divisors, whose sum is σ = 3961540607994. Its totient is φ = 3961540607992.

The previous prime is 3961540607933. The next prime is 3961540608001. The reversal of 3961540607993 is 3997060451693.

3961540607993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2849840293609 + 1111700314384 = 1688147^2 + 1054372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3961540607993 is a prime.

It is not a weakly prime, because it can be changed into another prime (3961540607933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980770303996 + 1980770303997.

It is an arithmetic number, because the mean of its divisors is an integer number (1980770303997).

Almost surely, 2^{3961540607993} is an apocalyptic number.

It is an amenable number.

3961540607993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961540607993 is an equidigital number, since it uses as much as digits as its factorization.

3961540607993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33067440, while the sum is 62.

The spelling of 3961540607993 in words is "three trillion, nine hundred sixty-one billion, five hundred forty million, six hundred seven thousand, nine hundred ninety-three".