91786687534033 has 2 divisors, whose sum is σ = 91786687534034. Its totient is φ = 91786687534032.

The previous prime is 91786687533953. The next prime is 91786687534123. The reversal of 91786687534033 is 33043578668719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50096059712449 + 41690627821584 = 7077857^2 + 6456828^2 .

It is an emirp because it is prime and its reverse (33043578668719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91786687534033 - 2⁴¹ = 89587664278481 is a prime.

It is not a weakly prime, because it can be changed into another prime (91786687574033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45893343767016 + 45893343767017.

It is an arithmetic number, because the mean of its divisors is an integer number (45893343767017).

Almost surely, 2^{91786687534033} is an apocalyptic number.

It is an amenable number.

91786687534033 is a deficient number, since it is larger than the sum of its proper divisors (1).

91786687534033 is an equidigital number, since it uses as much as digits as its factorization.

91786687534033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 548674560, while the sum is 70.

The spelling of 91786687534033 in words is "ninety-one trillion, seven hundred eighty-six billion, six hundred eighty-seven million, five hundred thirty-four thousand, thirty-three".