355561447391191 has 2 divisors, whose sum is σ = 355561447391192. Its totient is φ = 355561447391190.

The previous prime is 355561447391153. The next prime is 355561447391243. The reversal of 355561447391191 is 191193744165553.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (191193744165553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 355561447391191 - 2⁹ = 355561447390679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355561447391131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177780723695595 + 177780723695596.

It is an arithmetic number, because the mean of its divisors is an integer number (177780723695596).

Almost surely, 2^{355561447391191} is an apocalyptic number.

355561447391191 is a deficient number, since it is larger than the sum of its proper divisors (1).

355561447391191 is an equidigital number, since it uses as much as digits as its factorization.

355561447391191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236000, while the sum is 64.

The spelling of 355561447391191 in words is "three hundred fifty-five trillion, five hundred sixty-one billion, four hundred forty-seven million, three hundred ninety-one thousand, one hundred ninety-one".