91328118500321 has 2 divisors, whose sum is σ = 91328118500322. Its totient is φ = 91328118500320.

The previous prime is 91328118500303. The next prime is 91328118500357. The reversal of 91328118500321 is 12300581182319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88929879109696 + 2398239390625 = 9430264^2 + 1548625^2 .

It is an emirp because it is prime and its reverse (12300581182319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91328118500321 is a prime.

It is not a weakly prime, because it can be changed into another prime (91328118500821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45664059250160 + 45664059250161.

It is an arithmetic number, because the mean of its divisors is an integer number (45664059250161).

Almost surely, 2^{91328118500321} is an apocalyptic number.

It is an amenable number.

91328118500321 is a deficient number, since it is larger than the sum of its proper divisors (1).

91328118500321 is an equidigital number, since it uses as much as digits as its factorization.

91328118500321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 91328118500321 in words is "ninety-one trillion, three hundred twenty-eight billion, one hundred eighteen million, five hundred thousand, three hundred twenty-one".