91159689547 has 2 divisors, whose sum is σ = 91159689548. Its totient is φ = 91159689546.

The previous prime is 91159689521. The next prime is 91159689629. The reversal of 91159689547 is 74598695119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91159689547 - 2¹¹ = 91159687499 is a prime.

It is not a weakly prime, because it can be changed into another prime (91159669547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45579844773 + 45579844774.

It is an arithmetic number, because the mean of its divisors is an integer number (45579844774).

Almost surely, 2^91159689547 is an apocalyptic number.

91159689547 is a deficient number, since it is larger than the sum of its proper divisors (1).

91159689547 is an equidigital number, since it uses as much as digits as its factorization.

91159689547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 64.

The spelling of 91159689547 in words is "ninety-one billion, one hundred fifty-nine million, six hundred eighty-nine thousand, five hundred forty-seven".