91118151807673 has 2 divisors, whose sum is σ = 91118151807674. Its totient is φ = 91118151807672.

The previous prime is 91118151807643. The next prime is 91118151807691. The reversal of 91118151807673 is 37670815181119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89637191806864 + 1480960000809 = 9467692^2 + 1216947^2 .

It is a cyclic number.

It is not a de Polignac number, because 91118151807673 - 2²¹ = 91118149710521 is a prime.

It is a super-2 number, since 2×91118151807673² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91118151807643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45559075903836 + 45559075903837.

It is an arithmetic number, because the mean of its divisors is an integer number (45559075903837).

Almost surely, 2^{91118151807673} is an apocalyptic number.

It is an amenable number.

91118151807673 is a deficient number, since it is larger than the sum of its proper divisors (1).

91118151807673 is an equidigital number, since it uses as much as digits as its factorization.

91118151807673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 58.

The spelling of 91118151807673 in words is "ninety-one trillion, one hundred eighteen billion, one hundred fifty-one million, eight hundred seven thousand, six hundred seventy-three".