91405498543 has 2 divisors, whose sum is σ = 91405498544. Its totient is φ = 91405498542.

The previous prime is 91405498531. The next prime is 91405498571. The reversal of 91405498543 is 34589450419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91405498543 - 2³³ = 82815563951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91405498343) 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, 45702749271 + 45702749272.

It is an arithmetic number, because the mean of its divisors is an integer number (45702749272).

Almost surely, 2^91405498543 is an apocalyptic number.

91405498543 is a deficient number, since it is larger than the sum of its proper divisors (1).

91405498543 is an equidigital number, since it uses as much as digits as its factorization.

91405498543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 91405498543 in words is "ninety-one billion, four hundred five million, four hundred ninety-eight thousand, five hundred forty-three".