91067851098149 has 2 divisors, whose sum is σ = 91067851098150. Its totient is φ = 91067851098148.

The previous prime is 91067851098143. The next prime is 91067851098187. The reversal of 91067851098149 is 94189015876019.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57489650689249 + 33578200408900 = 7582193^2 + 5794670^2 .

It is a cyclic number.

It is not a de Polignac number, because 91067851098149 - 2²⁰ = 91067850049573 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91067851098143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45533925549074 + 45533925549075.

It is an arithmetic number, because the mean of its divisors is an integer number (45533925549075).

Almost surely, 2^{91067851098149} is an apocalyptic number.

It is an amenable number.

91067851098149 is a deficient number, since it is larger than the sum of its proper divisors (1).

91067851098149 is an equidigital number, since it uses as much as digits as its factorization.

91067851098149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39191040, while the sum is 68.

The spelling of 91067851098149 in words is "ninety-one trillion, sixty-seven billion, eight hundred fifty-one million, ninety-eight thousand, one hundred forty-nine".