355206311123891 has 2 divisors, whose sum is σ = 355206311123892. Its totient is φ = 355206311123890.

The previous prime is 355206311123819. The next prime is 355206311123933. The reversal of 355206311123891 is 198321113602553.

Together with previous prime (355206311123819) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (198321113602553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355206311123891 - 2⁴⁶ = 284837566946227 is a prime.

It is not a weakly prime, because it can be changed into another prime (355206311123491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177603155561945 + 177603155561946.

It is an arithmetic number, because the mean of its divisors is an integer number (177603155561946).

Almost surely, 2^{355206311123891} is an apocalyptic number.

355206311123891 is a deficient number, since it is larger than the sum of its proper divisors (1).

355206311123891 is an equidigital number, since it uses as much as digits as its factorization.

355206311123891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The spelling of 355206311123891 in words is "three hundred fifty-five trillion, two hundred six billion, three hundred eleven million, one hundred twenty-three thousand, eight hundred ninety-one".