91559559163 has 2 divisors, whose sum is σ = 91559559164. Its totient is φ = 91559559162.

The previous prime is 91559559137. The next prime is 91559559167. The reversal of 91559559163 is 36195595519.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91559559163 - 2²¹ = 91557462011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91559559098 and 91559559107.

It is not a weakly prime, because it can be changed into another prime (91559559167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45779779581 + 45779779582.

It is an arithmetic number, because the mean of its divisors is an integer number (45779779582).

Almost surely, 2^91559559163 is an apocalyptic number.

91559559163 is a deficient number, since it is larger than the sum of its proper divisors (1).

91559559163 is an equidigital number, since it uses as much as digits as its factorization.

91559559163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8201250, while the sum is 58.

The spelling of 91559559163 in words is "ninety-one billion, five hundred fifty-nine million, five hundred fifty-nine thousand, one hundred sixty-three".