543451774505491 has 2 divisors, whose sum is σ = 543451774505492. Its totient is φ = 543451774505490.

The previous prime is 543451774505461. The next prime is 543451774505561. The reversal of 543451774505491 is 194505477154345.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 543451774505491 - 2⁷ = 543451774505363 is a prime.

It is not a weakly prime, because it can be changed into another prime (543451774505461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271725887252745 + 271725887252746.

It is an arithmetic number, because the mean of its divisors is an integer number (271725887252746).

Almost surely, 2^{543451774505491} is an apocalyptic number.

543451774505491 is a deficient number, since it is larger than the sum of its proper divisors (1).

543451774505491 is an equidigital number, since it uses as much as digits as its factorization.

543451774505491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680000, while the sum is 64.

The spelling of 543451774505491 in words is "five hundred forty-three trillion, four hundred fifty-one billion, seven hundred seventy-four million, five hundred five thousand, four hundred ninety-one".