91766895953 has 2 divisors, whose sum is σ = 91766895954. Its totient is φ = 91766895952.

The previous prime is 91766895947. The next prime is 91766896009. The reversal of 91766895953 is 35959866719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69710784784 + 22056111169 = 264028^2 + 148513^2 .

It is a cyclic number.

It is not a de Polignac number, because 91766895953 - 2⁶ = 91766895889 is a prime.

It is not a weakly prime, because it can be changed into another prime (91766894953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45883447976 + 45883447977.

It is an arithmetic number, because the mean of its divisors is an integer number (45883447977).

Almost surely, 2^91766895953 is an apocalyptic number.

It is an amenable number.

91766895953 is a deficient number, since it is larger than the sum of its proper divisors (1).

91766895953 is an equidigital number, since it uses as much as digits as its factorization.

91766895953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110224800, while the sum is 68.

The spelling of 91766895953 in words is "ninety-one billion, seven hundred sixty-six million, eight hundred ninety-five thousand, nine hundred fifty-three".