391266068741 has 2 divisors, whose sum is σ = 391266068742. Its totient is φ = 391266068740.

The previous prime is 391266068659. The next prime is 391266068779. The reversal of 391266068741 is 147860662193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359268372100 + 31997696641 = 599390^2 + 178879^2 .

It is a cyclic number.

It is not a de Polignac number, because 391266068741 - 2¹⁸ = 391265806597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391266068441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195633034370 + 195633034371.

It is an arithmetic number, because the mean of its divisors is an integer number (195633034371).

Almost surely, 2^391266068741 is an apocalyptic number.

It is an amenable number.

391266068741 is a deficient number, since it is larger than the sum of its proper divisors (1).

391266068741 is an equidigital number, since it uses as much as digits as its factorization.

391266068741 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The spelling of 391266068741 in words is "three hundred ninety-one billion, two hundred sixty-six million, sixty-eight thousand, seven hundred forty-one".