91286646163 has 2 divisors, whose sum is σ = 91286646164. Its totient is φ = 91286646162.

The previous prime is 91286646071. The next prime is 91286646167. The reversal of 91286646163 is 36164668219.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36164668219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91286646163 - 2²¹ = 91284549011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91286646163.

It is not a weakly prime, because it can be changed into another prime (91286646167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45643323081 + 45643323082.

It is an arithmetic number, because the mean of its divisors is an integer number (45643323082).

Almost surely, 2^91286646163 is an apocalyptic number.

91286646163 is a deficient number, since it is larger than the sum of its proper divisors (1).

91286646163 is an equidigital number, since it uses as much as digits as its factorization.

91286646163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 52.

The spelling of 91286646163 in words is "ninety-one billion, two hundred eighty-six million, six hundred forty-six thousand, one hundred sixty-three".