91705751611 has 2 divisors, whose sum is σ = 91705751612. Its totient is φ = 91705751610.

The previous prime is 91705751603. The next prime is 91705751617. The reversal of 91705751611 is 11615750719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91705751611 - 2³ = 91705751603 is a prime.

It is not a weakly prime, because it can be changed into another prime (91705751617) 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, 45852875805 + 45852875806.

It is an arithmetic number, because the mean of its divisors is an integer number (45852875806).

Almost surely, 2^91705751611 is an apocalyptic number.

91705751611 is a deficient number, since it is larger than the sum of its proper divisors (1).

91705751611 is an equidigital number, since it uses as much as digits as its factorization.

91705751611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 43.

The spelling of 91705751611 in words is "ninety-one billion, seven hundred five million, seven hundred fifty-one thousand, six hundred eleven".